diff --git a/back/src/org/kar/karusic/WebLauncherLocal.java b/back/src/org/kar/karusic/WebLauncherLocal.java
index 41804e3..ca5ec7f 100755
--- a/back/src/org/kar/karusic/WebLauncherLocal.java
+++ b/back/src/org/kar/karusic/WebLauncherLocal.java
@@ -35,6 +35,7 @@ public class WebLauncherLocal extends WebLauncher {
 			ConfigBaseVariable.dbPort = "3906";
 			ConfigBaseVariable.testMode = "true";
 		}
+		// Test fail of SSO: ConfigBaseVariable.ssoAdress = null;
 		try {
 			super.migrateDB();
 		} catch (final Exception e) {
diff --git a/front/src/components/AudioPlayer.tsx b/front/src/components/AudioPlayer.tsx
index f488b48..0e24af7 100644
--- a/front/src/components/AudioPlayer.tsx
+++ b/front/src/components/AudioPlayer.tsx
@@ -1,6 +1,13 @@
 import { useEffect, useRef, useState } from 'react';
 
-import { Box, Flex, IconButton, SliderTrack, Text } from '@chakra-ui/react';
+import {
+  Box,
+  Flex,
+  IconButton,
+  SliderTrack,
+  Text,
+  chakra,
+} from '@chakra-ui/react';
 import {
   MdFastForward,
   MdFastRewind,
@@ -223,6 +230,7 @@ export const AudioPlayer = ({}: AudioPlayerProps) => {
           paddingX="10px"
           marginX="15px"
           bottom={0}
+          //top="calc(100% - 150px)"
           left={0}
           right={0}
           zIndex={1000}
@@ -318,7 +326,9 @@ export const AudioPlayer = ({}: AudioPlayerProps) => {
               marginLeft="auto"
               variant="ghost"
             >
-              <MdNavigateBefore style={{ width: '100%', height: '100%' }} />{' '}
+              <MdNavigateBefore
+                style={{ width: '100%', height: '100%' }}
+              />{' '}
             </IconButton>
             <IconButton
               {...configButton}
@@ -357,7 +367,7 @@ export const AudioPlayer = ({}: AudioPlayerProps) => {
         </Flex>
       )}
 
-      <audio
+      <chakra.audio
         src={mediaSource}
         ref={audioRef}
         //preload={true}
diff --git a/front/src/components/TopBar/TopBar.tsx b/front/src/components/TopBar/TopBar.tsx
index 7a68ec4..cbcb150 100644
--- a/front/src/components/TopBar/TopBar.tsx
+++ b/front/src/components/TopBar/TopBar.tsx
@@ -29,6 +29,7 @@ import {
   MdMore,
   MdOutlinePlaylistPlay,
   MdOutlineUploadFile,
+  MdRestartAlt,
   MdSupervisedUserCircle,
 } from 'react-icons/md';
 import { useNavigate } from 'react-router-dom';
@@ -47,7 +48,6 @@ import {
   MenuTrigger,
 } from '@/components/ui/menu';
 import { useServiceContext } from '@/service/ServiceContext';
-import { SessionState } from '@/service/SessionState';
 import { useSessionService } from '@/service/session';
 import { colors } from '@/theme/colors';
 import {
@@ -120,11 +120,16 @@ export const TopBar = ({
   const navigate = useNavigate();
   const { colorMode, toggleColorMode } = useColorMode();
   const { session } = useServiceContext();
-  const { clearToken } = useSessionService();
+  const { clearToken, isConnected } = useSessionService();
   const backColor = useColorModeValue('back.100', 'back.800');
   const drawerDisclose = useDisclosure();
-  const onChangeTheme = () => {
-    drawerDisclose.onOpen();
+  const isVisible = useBreakpointValue({ base: false, md: true });
+  const onOpenLeftMenu = () => {
+    if (!isConnected) {
+      onForceReload();
+    } else {
+      drawerDisclose.onOpen();
+    }
   };
   const onSignIn = (): void => {
     clearToken();
@@ -141,7 +146,10 @@ export const TopBar = ({
   const onKarso = (): void => {
     requestOpenSite();
   };
-  const isVisible = useBreakpointValue({ base: false, md: true });
+  const onForceReload = (): void => {
+    // @ts-expect-error
+    window.location.reload(true);
+  };
   return (
     <Flex
       minWidth="320px"
@@ -158,7 +166,7 @@ export const TopBar = ({
       boxShadow={'0px 2px 4px ' + colors.back[900]}
       zIndex={200}
     >
-      <Button {...BUTTON_TOP_BAR_PROPERTY} onClick={onChangeTheme}>
+      <Button {...BUTTON_TOP_BAR_PROPERTY} onClick={onOpenLeftMenu}>
         <HStack>
           <LuAlignJustify />
           {isVisible && (
@@ -169,7 +177,7 @@ export const TopBar = ({
         </HStack>
       </Button>
       {title && (
-        <Text
+        <Flex
           truncate
           fontSize="20px"
           fontWeight="bold"
@@ -183,11 +191,11 @@ export const TopBar = ({
             {titleIcon}
             {title}
           </Flex>
-        </Text>
+        </Flex>
       )}
       {children}
       <Flex right="0">
-        {session?.state !== SessionState.CONNECTED && (
+        {!session?.isConnected && (
           <>
             <Button {...BUTTON_TOP_BAR_PROPERTY} onClick={onSignIn}>
               <LuLogIn />
@@ -207,7 +215,7 @@ export const TopBar = ({
             </Button>
           </>
         )}
-        {session?.state === SessionState.CONNECTED && (
+        {session?.isConnected && (
           <MenuRoot>
             <MenuTrigger asChild>
               <IconButton {...BUTTON_TOP_BAR_PROPERTY} width={TOP_BAR_HEIGHT}>
@@ -248,6 +256,13 @@ export const TopBar = ({
               <MenuItem value="karso" valueText="Karso" onClick={onKarso}>
                 <LuKeySquare /> Karso (SSO)
               </MenuItem>
+              <MenuItem
+                value="force_reload"
+                valueText="Karso"
+                onClick={onForceReload}
+              >
+                <MdRestartAlt /> force reload
+              </MenuItem>
               {colorMode === 'light' ? (
                 <MenuItem
                   value="set-dark"
@@ -269,50 +284,52 @@ export const TopBar = ({
           </MenuRoot>
         )}
       </Flex>
-      <DrawerRoot
-        placement="start"
-        onOpenChange={drawerDisclose.onClose}
-        open={drawerDisclose.open}
-        data-testid="top-bar_drawer-root"
-      >
-        <DrawerContent data-testid="top-bar_drawer-content">
-          <DrawerHeader
-            paddingY="auto"
-            as="button"
-            onClick={drawerDisclose.onClose}
-            boxShadow={'0px 2px 4px ' + colors.back[900]}
-            backgroundColor={backColor}
-            color={useColorModeValue('brand.900', 'brand.50')}
-            textTransform="uppercase"
-          >
-            <HStack {...BUTTON_TOP_BAR_PROPERTY} cursor="pointer">
-              <LuArrowBigLeft />
-              <Span paddingLeft="3px">Karusic</Span>
-            </HStack>
-          </DrawerHeader>
-          <DrawerBody paddingX="0px">
-            <Box marginY="3" />
-            <ButtonMenuLeft
-              onClickEnd={drawerDisclose.onClose}
-              dest="/"
-              title="Home"
-              icon={<MdHome />}
-            />
-            <ButtonMenuLeft
-              onClickEnd={drawerDisclose.onClose}
-              dest="/on-air"
-              title="On air"
-              icon={<MdOutlinePlaylistPlay />}
-            />
-            <ButtonMenuLeft
-              onClickEnd={drawerDisclose.onClose}
-              dest="/add"
-              title="Add Media"
-              icon={<MdOutlineUploadFile />}
-            />
-          </DrawerBody>
-        </DrawerContent>
-      </DrawerRoot>
+      {session?.isConnected && (
+        <DrawerRoot
+          placement="start"
+          onOpenChange={drawerDisclose.onClose}
+          open={drawerDisclose.open}
+          data-testid="top-bar_drawer-root"
+        >
+          <DrawerContent data-testid="top-bar_drawer-content">
+            <DrawerHeader
+              paddingY="auto"
+              as="button"
+              onClick={drawerDisclose.onClose}
+              boxShadow={'0px 2px 4px ' + colors.back[900]}
+              backgroundColor={backColor}
+              color={useColorModeValue('brand.900', 'brand.50')}
+              textTransform="uppercase"
+            >
+              <HStack {...BUTTON_TOP_BAR_PROPERTY} cursor="pointer">
+                <LuArrowBigLeft />
+                <Span paddingLeft="3px">Karusic</Span>
+              </HStack>
+            </DrawerHeader>
+            <DrawerBody paddingX="0px">
+              <Box marginY="3" />
+              <ButtonMenuLeft
+                onClickEnd={drawerDisclose.onClose}
+                dest="/"
+                title="Home"
+                icon={<MdHome />}
+              />
+              <ButtonMenuLeft
+                onClickEnd={drawerDisclose.onClose}
+                dest="/on-air"
+                title="On air"
+                icon={<MdOutlinePlaylistPlay />}
+              />
+              <ButtonMenuLeft
+                onClickEnd={drawerDisclose.onClose}
+                dest="/add"
+                title="Add Media"
+                icon={<MdOutlineUploadFile />}
+              />
+            </DrawerBody>
+          </DrawerContent>
+        </DrawerRoot>
+      )}
     </Flex>
   );
 };
diff --git a/front/src/scene/AppRoutes.tsx b/front/src/scene/AppRoutes.tsx
index 97f9616..88b61ac 100644
--- a/front/src/scene/AppRoutes.tsx
+++ b/front/src/scene/AppRoutes.tsx
@@ -21,7 +21,7 @@ import { SettingsPage } from './home/SettingsPage';
 import { OnAirPage } from './onAir/OnAirPage';
 
 export const AppRoutes = () => {
-  const { isReadable } = useHasRight('user');
+  const { isReadable } = useHasRight('USER');
   return (
     <HistoryRouter
       // @ts-expect-error
diff --git a/front/src/scene/sso/SSOPage.tsx b/front/src/scene/sso/SSOPage.tsx
index 0726650..7c6c524 100644
--- a/front/src/scene/sso/SSOPage.tsx
+++ b/front/src/scene/sso/SSOPage.tsx
@@ -1,48 +1,58 @@
 import { useEffect } from 'react';
 
-import { Center, Heading, Image, Text } from '@chakra-ui/react';
+import { Center, Flex, Heading, Image, Text } from '@chakra-ui/react';
+import { MdFactCheck, MdWarning } from 'react-icons/md';
 import { useNavigate, useParams } from 'react-router-dom';
+import { useEffectOnce } from 'react-use';
 
 import avatar_generic from '@/assets/images/avatar_generic.svg';
+import { Icon } from '@/components';
 import { PageLayoutInfoCenter } from '@/components/Layout/PageLayoutInfoCenter';
 import { TopBar } from '@/components/TopBar/TopBar';
-import { isDevelopmentEnvironment } from '@/environment';
-import { SessionState } from '@/service/SessionState';
+import { toaster } from '@/components/ui/toaster';
 import { useSessionService } from '@/service/session';
 import { b64_to_utf8 } from '@/utils/sso';
 
 export const SSOPage = () => {
   const { data, keepConnected, token } = useParams();
-  console.log(`- data: ${data}`);
-  console.log(`- keepConnected: ${keepConnected}`);
-  console.log(`- token: ${token}`);
+  //const { data, keepConnected, token } = useState<string|undefined>();
+  // console.log(`- data: ${data}`);
+  // console.log(`- keepConnected: ${keepConnected}`);
+  // console.log(`- token: ${token}`);
   const navigate = useNavigate();
-  const { state, setToken, login, clearToken } = useSessionService();
-  useEffect(() => {
-    if (token) {
-      setToken(token);
-    } else {
-      clearToken();
+  const { isConnected, errorSession, setToken, login } = useSessionService();
+  useEffectOnce(() => {
+    if (token === undefined || token === '') {
+      return;
     }
-  }, [token, setToken, clearToken]);
-  const delay = isDevelopmentEnvironment() ? 2000 : 2000;
+    try {
+      setToken(token);
+    } catch (e) {
+      toaster.create({
+        title: 'Connection Fail',
+        description: `invalid token data model.`,
+        type: 'error',
+      });
+      navigate('/');
+    }
+  });
+  const delay = 1000;
   useEffect(() => {
-    if (state === SessionState.CONNECTED) {
-      const destination = data ? b64_to_utf8(data) : '/';
-      console.log(`program redirect to: ${destination} (${delay}ms)`);
+    if (isConnected) {
+      toaster.create({
+        title: 'Connection Succeed',
+        description: `Welcome back: ${login}.`,
+        type: 'success',
+      });
+      const destination = data ? b64_to_utf8(data) : '/home';
+      const destinationFinal = destination === '' ? '/home' : destination;
+      console.log(`program redirect to: '${destinationFinal}' (${delay}ms)`);
       setTimeout(() => {
-        navigate(`/${destination}`);
+        // note: check if the "navigate" is in the dependence of the use effect!!!
+        navigate(`/${destinationFinal}`, { replace: true });
       }, delay);
     }
-  }, [state]);
-  /*
-  const [searchParams] = useSearchParams();
-  console.log(`data: ${searchParams.get('data')}`);
-  console.log(`keepConnected: ${searchParams.get('keepConnected')}`);
-  console.log(`token: ${searchParams.get('token')}`);
-  const dataFromParam = useGetCreateActionParams();
-  console.log(`data group: ${JSON.stringify(dataFromParam, null, 2)}`);
-  */
+  }, [isConnected, login, navigate]);
   return (
     <>
       <TopBar />
@@ -54,31 +64,53 @@ export const SSOPage = () => {
         <Center w="full">
           <Image src={avatar_generic} boxSize="150px" borderRadius="full" />
         </Center>
-        {token === '__CANCEL__' && (
-          <Text>
-            <b>ERROR: </b> Request cancel of connection !
-          </Text>
-        )}
-        {token === '__FAIL__' && (
-          <Text>
-            <b>ERROR: </b> Connection FAIL !
-          </Text>
-        )}
-        {token === '__LOGOUT__' && (
-          <Text>
-            <b>Dis-connected: </b> Redirect soon!{' '}
-          </Text>
-        )}
-        {!['__LOGOUT__', '__FAIL__', '__CANCEL__'].includes(token ?? '') && (
+        {!isConnected && errorSession !== undefined && (
           <>
-            <Text>
-              <b>Connected: </b> Redirect soon!
-            </Text>
-            <Text>
-              <b>Welcome back: </b> {login}
-            </Text>
+            <Flex color="red.500" fontSize="25px" gap={2} marginX="auto">
+              <Icon sizeIcon="55px">
+                <MdWarning />
+              </Icon>
+              <Text marginY="auto">
+                <b>ERROR: </b> {errorSession.message}
+              </Text>
+            </Flex>
+            {errorSession.description && (
+              <Text
+                whiteSpace="pre-line"
+                fontSize="25px"
+                gap={2}
+                marginX="auto"
+              >
+                {errorSession.description}
+              </Text>
+            )}
           </>
         )}
+        {!isConnected && errorSession === undefined && (
+          <Flex color="red.500" fontSize="25px" gap={2} marginX="auto">
+            <Icon sizeIcon="55px">
+              <MdWarning />
+            </Icon>
+            <Text marginY="auto">
+              <b>ERROR: </b> Not connected !
+            </Text>
+          </Flex>
+        )}
+        {isConnected && (
+          <Flex direction="column">
+            <Flex color="green.500" fontSize="25px" gap={2} marginX="auto">
+              <MdFactCheck />
+              <Text marginY="auto">
+                <b>Connected: </b> Redirect soon!
+              </Text>
+            </Flex>
+            <Flex fontSize="25px" gap={2} marginX="auto">
+              <Text marginY="auto">
+                <b>Welcome back: </b> {login}
+              </Text>
+            </Flex>
+          </Flex>
+        )}
       </PageLayoutInfoCenter>
     </>
   );
diff --git a/front/src/service/Album.ts b/front/src/service/Album.ts
index 8f1998b..187fddb 100644
--- a/front/src/service/Album.ts
+++ b/front/src/service/Album.ts
@@ -1,4 +1,4 @@
-import { useEffect, useMemo, useState } from 'react';
+import { useMemo } from 'react';
 
 import { Album, AlbumResource } from '@/back-api';
 import { useServiceContext } from '@/service/ServiceContext';
@@ -23,14 +23,14 @@ export const useAlbumServiceWrapped = (
     {
       restApiName: 'ALBUM',
       primaryKey: 'id',
-      available: session.token !== undefined,
+      available: session.isConnected,
       getsCall: () => {
         return AlbumResource.gets({
           restConfig: session.getRestConfig(),
         });
       },
     },
-    [session.token]
+    [session.isConnected]
   );
 
   return { store };
diff --git a/front/src/service/Artist.ts b/front/src/service/Artist.ts
index fb27f0c..4bda1ac 100644
--- a/front/src/service/Artist.ts
+++ b/front/src/service/Artist.ts
@@ -23,14 +23,14 @@ export const useArtistServiceWrapped = (
     {
       restApiName: 'ARTIST',
       primaryKey: 'id',
-      available: session.token !== undefined,
+      available: session.isConnected,
       getsCall: () => {
         return ArtistResource.gets({
           restConfig: session.getRestConfig(),
         });
       },
     },
-    [session.token]
+    [session.isConnected]
   );
 
   return { store };
diff --git a/front/src/service/Gender.ts b/front/src/service/Gender.ts
index 04745ff..16c47fe 100644
--- a/front/src/service/Gender.ts
+++ b/front/src/service/Gender.ts
@@ -23,14 +23,14 @@ export const useGenderServiceWrapped = (
     {
       restApiName: 'GENDER',
       primaryKey: 'id',
-      available: session.token !== undefined,
+      available: session.isConnected,
       getsCall: () => {
         return GenderResource.gets({
           restConfig: session.getRestConfig(),
         });
       },
     },
-    [session.token]
+    [session.isConnected]
   );
 
   return { store };
diff --git a/front/src/service/ServiceContext.tsx b/front/src/service/ServiceContext.tsx
index 89869e1..277b9a1 100644
--- a/front/src/service/ServiceContext.tsx
+++ b/front/src/service/ServiceContext.tsx
@@ -1,5 +1,6 @@
 import { ReactNode, createContext, useContext, useMemo } from 'react';
 
+import { Album, Artist, Gender, Track } from '@/back-api';
 import {
   ActivePlaylistServiceProps,
   useActivePlaylistServiceWrapped,
@@ -7,7 +8,6 @@ import {
 import { AlbumServiceProps, useAlbumServiceWrapped } from '@/service/Album';
 import { ArtistServiceProps, useArtistServiceWrapped } from '@/service/Artist';
 import { useGenderServiceWrapped } from '@/service/Gender';
-import { SessionState } from '@/service/SessionState';
 import { TrackServiceProps, useTrackServiceWrapped } from '@/service/Track';
 import {
   RightPart,
@@ -15,7 +15,6 @@ import {
   getRestConfig,
   useSessionServiceWrapped,
 } from '@/service/session';
-import { Album, Artist, Gender, Track } from '@/back-api';
 import { DataStoreType } from '@/utils/data-store';
 
 export type ServiceContextType = {
@@ -27,7 +26,6 @@ export type ServiceContextType = {
   activePlaylist: ActivePlaylistServiceProps;
 };
 
-
 function emptyStore<TYPE>(): DataStoreType<TYPE> {
   return {
     data: [] as TYPE[],
@@ -43,22 +41,29 @@ function emptyStore<TYPE>(): DataStoreType<TYPE> {
     error: undefined,
     update: (_request: Promise<TYPE>, _key?: string) => {
       console.error('!!! WTF !!!');
-      return new Promise((resolve, reject) => { reject("fail") });
+      return new Promise((resolve, reject) => {
+        reject('fail');
+      });
     },
-    updateRaw: (_data: TYPE, _key?: string) => { },
-    remove: (_id: number | string, _request: Promise<void>, _key?: string): void => {
+    updateRaw: (_data: TYPE, _key?: string) => {},
+    remove: (
+      _id: number | string,
+      _request: Promise<void>,
+      _key?: string
+    ): void => {
       console.error('!!! WTF !!!');
-    }
+    },
   };
 }
 
 export const ServiceContext = createContext<ServiceContextType>({
   session: {
-    setToken: (token: string) => { },
-    clearToken: () => { },
+    isConnected: false,
+    errorSession: undefined,
+    setToken: (token: string) => {},
+    clearToken: () => {},
     hasReadRight: (part: RightPart) => false,
     hasWriteRight: (part: RightPart) => false,
-    state: SessionState.NO_USER,
     getRestConfig: getRestConfig,
   },
   track: {
diff --git a/front/src/service/SessionState.ts b/front/src/service/SessionState.ts
deleted file mode 100644
index e9e4ca8..0000000
--- a/front/src/service/SessionState.ts
+++ /dev/null
@@ -1,7 +0,0 @@
-export enum SessionState {
-  NO_USER,
-  CONNECTING,
-  CONNECTION_FAIL,
-  CONNECTED,
-  DISCONNECT,
-}
diff --git a/front/src/service/Track.ts b/front/src/service/Track.ts
index a5466c2..4a4e636 100644
--- a/front/src/service/Track.ts
+++ b/front/src/service/Track.ts
@@ -1,4 +1,4 @@
-import { useCallback, useEffect, useMemo, useState } from 'react';
+import { useMemo } from 'react';
 
 import { Track, TrackResource } from '@/back-api';
 import { useServiceContext } from '@/service/ServiceContext';
@@ -23,14 +23,14 @@ export const useTrackServiceWrapped = (
     {
       restApiName: 'TRACK',
       primaryKey: 'id',
-      available: session.token !== undefined,
+      available: session.isConnected,
       getsCall: () => {
         return TrackResource.gets({
           restConfig: session.getRestConfig(),
         });
       },
     },
-    [session.token]
+    [session.isConnected]
   );
 
   return { store };
diff --git a/front/src/service/session.ts b/front/src/service/session.ts
index 3f9cd1d..26d25f1 100644
--- a/front/src/service/session.ts
+++ b/front/src/service/session.ts
@@ -1,18 +1,18 @@
 import { useCallback, useEffect, useMemo, useState } from 'react';
 
 import { createListCollection } from '@chakra-ui/react';
-import { useEffectOnce } from 'react-use';
 
 import {
+  JwtToken,
   PartRight,
   RESTConfig,
-  UserMe,
+  RestErrorResponse,
   UserResource,
   setErrorApiGlobalCallback,
 } from '@/back-api';
+import { toaster } from '@/components/ui/toaster';
 import { environment, getApiUrl } from '@/environment';
 import { useServiceContext } from '@/service/ServiceContext';
-import { SessionState } from '@/service/SessionState';
 import { isBrowser } from '@/utils/layout';
 import { parseToken } from '@/utils/sso';
 
@@ -37,7 +37,7 @@ export const USERS = {
 export const getUserToken = () => {
   return localStorage.getItem(TOKEN_KEY);
 };
-export type RightPart = 'admin' | 'user';
+export type RightPart = 'ADMIN' | 'USER';
 
 export function getRestConfig(): RESTConfig {
   return {
@@ -46,14 +46,48 @@ export function getRestConfig(): RESTConfig {
   };
 }
 
+const getDeltaPrint = (date: Date): string => {
+  const now = new Date();
+  let deltaSeconds = Math.floor((date.getTime() - now.getTime()) / 1000);
+  const isPast = deltaSeconds < 0;
+
+  deltaSeconds = Math.abs(deltaSeconds);
+
+  const days = Math.floor(deltaSeconds / 86400);
+  deltaSeconds %= 86400;
+
+  const hours = Math.floor(deltaSeconds / 3600);
+  deltaSeconds %= 3600;
+
+  const minutes = Math.floor(deltaSeconds / 60);
+  const seconds = deltaSeconds % 60;
+
+  const result = [days > 0 ? `${days}j` : '', `${hours}h${minutes}:${seconds}s`]
+    .filter(Boolean)
+    .join(' ');
+
+  return `${result}${isPast ? ' ago' : ''}`;
+};
+
+const isInThePast = (date: Date): boolean => {
+  const now = new Date();
+  return date.getTime() < now.getTime();
+};
+
+export type SessionErrorType = {
+  message: string;
+  description?: string;
+};
+
 export type SessionServiceProps = {
   token?: string;
+  isConnected: boolean;
+  errorSession?: SessionErrorType;
   setToken: (token: string) => void;
   clearToken: () => void;
   login?: string;
   hasReadRight: (part: RightPart) => boolean;
   hasWriteRight: (part: RightPart) => boolean;
-  state: SessionState;
   getRestConfig: () => RESTConfig;
 };
 
@@ -63,115 +97,161 @@ export const useSessionService = (): SessionServiceProps => {
 };
 
 export const useSessionServiceWrapped = (): SessionServiceProps => {
-  const [token, setToken] = useState<string | undefined>(
+  // Load the token from the system (init)
+  const [tokenStorage, setTokenStorage] = useState<string | undefined>(
     isBrowser ? (localStorage.getItem(TOKEN_KEY) ?? undefined) : undefined
   );
-  const [state, setState] = useState<SessionState>(SessionState.NO_USER);
-  const [config, setConfig] = useState<UserMe | undefined>(undefined);
+  // Token that is ready to use
+  const [tokenStr, setTokenStr] = useState<string>('');
+  const [errorSession, setErrorSession] = useState<
+    SessionErrorType | undefined
+  >(undefined);
+  const [token, setToken] = useState<JwtToken | undefined>(undefined);
 
-  useEffectOnce(() => {
-    setErrorApiGlobalCallback((response: Response) => {
-      if (response.status == 401) {
-        console.error('Detect 401 error ==> remove token');
-        clearToken();
-      }
-    });
-  });
+  const getRestConfigLocal = useCallback((): RESTConfig => {
+    return {
+      server: getApiUrl(),
+      token: tokenStr,
+    };
+  }, [tokenStr]);
 
-  const updateRight = useCallback(() => {
-    console.log('update right...');
+  const updateRight = useEffect(() => {
+    //console.log('Detect a new token...');
     if (isBrowser) {
-      console.log('Detect a new token...');
-
-      if (token === undefined) {
-        console.log(`  ==> No User`);
-        setState(SessionState.NO_USER);
-        setConfig(undefined);
+      //console.log('update internal property');
+      if (tokenStorage === undefined) {
+        //console.log(`  ==> No User`);
+        setToken(undefined);
+        setTokenStr('');
         localStorage.removeItem(TOKEN_KEY);
       } else {
-        console.log('  ==> Login ... (try to keep right)');
-        setState(SessionState.CONNECTING);
-        localStorage.setItem(TOKEN_KEY, token);
+        //console.log('  ==> Login ... (try to keep right)');
+        let tokenParsed: JwtToken | undefined = undefined;
+        try {
+          tokenParsed = parseToken(tokenStorage);
+        } catch (e) {
+          setErrorSession({
+            message: 'Fail to parse the token',
+          });
+          return;
+        }
+        //console.log(`get new token: ${JSON.stringify(tokenParsed, null, 2)}`);
+        const exp = new Date(tokenParsed.payload.exp * 1000);
+        if (isInThePast(exp)) {
+          //console.log(`token expired at: exp: ${exp.toISOString()}: delta=${getDeltaPrint(exp)}`);
+          const iat = new Date(tokenParsed.payload.iat * 1000);
+          //console.log(`iat: ${iat.toISOString()}: delta=${getDeltaPrint(iat)}`);
+          setErrorSession({
+            message: 'The inserted token has expired',
+            description: `It expired at ${exp.toISOString()}\nSince: ${getDeltaPrint(exp)}`,
+          });
+          return;
+        }
+        // Validate token on the server:
         UserResource.getMe({
-          restConfig: getRestConfig(),
+          restConfig: {
+            server: getApiUrl(),
+            token: tokenStorage,
+          },
         })
-          .then((response: UserMe) => {
-            //console.log(`    ==> New right arrived to '${response.login}'`);
-            setState(SessionState.CONNECTED);
-            setConfig(response);
+          .then((_response) => {
+            // if the login work well, then the token does not fail with authentication
+            //console.log('Authentication finished: ...');
+            setTokenStr(tokenStorage);
+            setToken(tokenParsed);
+            localStorage.setItem(TOKEN_KEY, tokenStorage);
           })
-          .catch((error) => {
-            setState(SessionState.CONNECTION_FAIL);
-            setConfig(undefined);
-            //console.log(`    ==> Fail to get right: '${error}'`);
+          .catch((error: RestErrorResponse) => {
+            setErrorSession({
+              message: 'The server reject the token.',
+              description: `name: ${error.name}\nmessage: "${error.message}"`,
+            });
+            setTokenStr('');
+            setToken(undefined);
             localStorage.removeItem(TOKEN_KEY);
           });
       }
     }
-  }, [localStorage, parseToken, token]);
+  }, [
+    localStorage,
+    parseToken,
+    setErrorSession,
+    setToken,
+    setTokenStr,
+    tokenStorage,
+  ]);
+
   const setTokenLocal = useCallback(
     (token?: string) => {
       if (token ? token.startsWith('__') : false) {
         token = undefined;
       }
-      setToken(token);
-      updateRight();
+      localStorage.removeItem(TOKEN_KEY);
+      setTokenStorage(token);
+      setTokenStr('');
+      setToken(undefined);
+      setErrorSession(undefined);
     },
     [updateRight, setToken]
   );
   const clearToken = useCallback(() => {
+    localStorage.removeItem(TOKEN_KEY);
+    setTokenLocal(undefined);
     setToken(undefined);
-    updateRight();
   }, [updateRight, setToken]);
+
+  useEffect(() => {
+    setErrorApiGlobalCallback((response: Response) => {
+      if (response.status == 401) {
+        toaster.create({
+          title: 'API request rejected',
+          description: `API Authentication rejected by server.`,
+          type: 'error',
+        });
+        clearToken();
+      }
+    });
+  }, [clearToken]);
+
   const hasReadRight = useCallback(
     (part: RightPart) => {
-      //console.log(`config = ${JSON.stringify(config, null, 2)}`);
-      const right = config?.rights[environment.applName];
+      //console.log(`right = ${JSON.stringify(token?.payload?.right?.[environment.applName], null, 2)}`);
+      const right = token?.payload?.right?.[environment.applName];
       if (right === undefined) {
         return false;
       }
       return [PartRight.READ, PartRight.READ_WRITE].includes(right[part]);
     },
-    [config]
+    [token]
   );
   const hasWriteRight = useCallback(
     (part: RightPart) => {
-      const right = config?.rights[environment.applName];
+      const right = token?.payload?.right?.[environment.applName];
       if (right === undefined) {
         return false;
       }
       return [PartRight.READ, PartRight.READ_WRITE].includes(right[part]);
     },
-    [config]
+    [token]
   );
 
-  const getRestConfig = useCallback((): RESTConfig => {
-    return {
-      server: getApiUrl(),
-      token: token ?? '',
-    };
-  }, [token]);
-
-  useEffect(() => {
-    updateRight();
-  }, [updateRight]);
-
   return {
-    token,
+    token: tokenStr,
+    isConnected: token !== undefined,
+    errorSession,
     setToken: setTokenLocal,
     clearToken,
-    login: config?.login,
+    login: token?.payload?.login,
     hasReadRight,
     hasWriteRight,
-    state,
-    getRestConfig,
+    getRestConfig: getRestConfigLocal,
   };
 };
 
 export const useHasRight = (part: RightPart) => {
   const { token, hasReadRight, hasWriteRight } = useSessionService();
   const isReadable = useMemo(() => {
-    console.log(`get is read for: ${part} ==> ${hasReadRight(part)}`);
+    //console.log(`get is read for: ${part} ==> ${hasReadRight(part)}`);
     return hasReadRight(part);
   }, [token, hasReadRight, part]);
   const isWritable = useMemo(() => {
diff --git a/front/src/utils/http.ts b/front/src/utils/http.ts
deleted file mode 100644
index cd3d741..0000000
--- a/front/src/utils/http.ts
+++ /dev/null
@@ -1,10 +0,0 @@
-import { RESTConfig } from '@/back-api';
-import { getApiUrl } from '@/environment';
-import { getUserToken } from '@/service/session';
-
-export function getRestConfig(): RESTConfig {
-  return {
-    server: getApiUrl(),
-    token: getUserToken() ?? '',
-  };
-}
diff --git a/front/src/utils/sso.ts b/front/src/utils/sso.ts
index a71af34..0b3c16f 100644
--- a/front/src/utils/sso.ts
+++ b/front/src/utils/sso.ts
@@ -1,3 +1,4 @@
+import { JwtToken, ZodJwtToken } from '@/back-api';
 import { environment } from '@/environment';
 import { getApplicationLocation } from '@/utils/applPath';
 
@@ -72,19 +73,28 @@ export function unHashLocalData(data: string): string | undefined {
   return undefined;
 }
 
-export function parseToken(token: string): object {
-  const cut = token.split('.');
-  const decoded = b64_to_utf8(cut[1]);
-  const jsonModel = JSON.parse(decoded);
-  if (jsonModel.right === undefined) {
-    return {};
+const convertBase64asJson = (data: string) => {
+  try {
+    const jsonBuffer = b64_to_utf8(data);
+    return JSON.parse(jsonBuffer);
+  } catch (e) {
+    console.error(`FAil to convert base64 data: ${e}`);
   }
-  if (jsonModel.right[environment.applName] === undefined) {
-    return {};
-  }
-  return jsonModel.right[environment.applName];
-}
+};
 
+export function parseToken(token: string): JwtToken {
+  const parts = token.split('.');
+  if (parts.length !== 3) {
+    console.error(`Wrong token model ${token}`);
+    throw new Error('Token JWT invalid');
+  }
+  const result = {
+    header: convertBase64asJson(parts[0]),
+    payload: convertBase64asJson(parts[1]),
+    signature: parts[2],
+  };
+  return ZodJwtToken.parse(result);
+}
 /**
  * Request Open SSO Global website
  */
@@ -98,14 +108,14 @@ export function requestSignIn(name?: string): void {
   console.log(
     `Request sign-in: '${environment.ssoSignIn}' + '${hashLocalData(name)}'`
   );
-  window.location.href = environment.ssoSignIn + hashLocalData(name) + "/";
+  window.location.href = environment.ssoSignIn + hashLocalData(name) + '/';
 }
 /**
  * Request SSO Disconnect
  */
 export function requestSignOut(name?: string): void {
   const url = environment.ssoSignOut + hashLocalData(name);
-  console.log(`Request just to the SSO: ${url}`)
+  console.log(`Request just to the SSO: ${url}`);
   // unlog from the SSO
   window.location.href = url;
 }
@@ -114,7 +124,7 @@ export function requestSignOut(name?: string): void {
  */
 export function requestSignUp(name?: string): void {
   const url = environment.ssoSignUp + hashLocalData(name);
-  console.log(`Request just to the SSO: ${url}`)
+  console.log(`Request just to the SSO: ${url}`);
   // unlog from the SSO
   window.location.href = url;
 }