I'm facing the same issue unfortunately with the following error :
The portal is having issues getting an authentication token. The experience rendered may be degraded.
Additional information from the call to get a token:
Extension: fx
Resource: jarvis
Details: The logged in user is not authorized to fetch tokens for extension 'fx' because the user account is not a member of tenant 'f8cdef31-a31e-4b4a-93e4-5f571e91255a'. Error details: AADSTS50020: User account '{EmailHidden}' from identity provider 'live.com' does not exist in tenant 'Microsoft Services' and cannot access the application 'c44b4083-3bb0-49c1-b47d-974e53cbdf3c'(Azure Portal) in that tenant. The account needs to be added as an external user in the tenant first. Sign out and sign in again with a different Azure Active Directory user account.
Trace ID: fb12356c-134a-4ce0-90af-0cd800748300
Correlation ID: f7650863-d274-4d06-9ea6-7cac438a6b85
Timestamp: 2022-04-04 02:28:07Z