When trying to log in to Mission-Control, we might encounter a behaviour which can be seen as "UI jumps around" and can also been identified in the logs as:
"FE-TOKEN authentication failed: reason: access token does not exist"
The above log message implies on one of the following scenarios:
- The UI session is expired
- More than one user is trying to log in with the same account
Please make sure to logout from all active sessions related to the user, refresh the UI page and login again from only one session.