Further Troubleshooting OAuth 2 guide improvements: authorization failures

[MarcialRosales]

Is your feature request related to a problem? Please describe.

Sometimes a user who has successfully logged in to the management ui get an "Not authorized" error after they attempt to create a queue, or read from a queue. The user assumes that once it has successfully logged in and maybe has the administrator user tag, the user can do anything.

Describe the solution you'd like

The Oauth2 troubleshooting guide has already an entry with the title "No Authorized". However, this entry is for users who try to login for the first time and they get that error. However, there should be another "Not Authorized" entry for users who are already logged in but still get this error.

Ideally, the error "Not Authorized" should link directly to the troubleshooting guide.

Describe alternatives you've considered

No response

Additional context

No response