Hi,
Welcome to the community!
There are a number of other threads in the community where people tackle this issue. You may find them helpful. The search functionality works quite well, but as a starting point:
- SAML error after upgrade to 8.4 - #7 by Rob_White
- SAML Authentication Issue after Updating to v8.4 - #4 by cloudBrett
- Receive "not authorized" oauth2/callback/saml response error after upgrade to SonarQube 8.4 - #5 by kirkpabk
HTH,
Ann