After upgrading to 8.1.18 can log into webpage but not Designer

I just upgraded to 8.1.18 and I can log into the webserver, but I can’t login with the same creds into the Designer with “Login failed. Please try again”. I’ve tried other creds as well with no success.

More context:

  • I have a backend and frontend gateway.
  • I can log into the frontend designer but not the backend designer.
  • I restored disabled but have enabled all that I need to (I believe).

I’m sure I’m missing something dumb…

Yep, it was very dumb…
The “System User Source” was set to the wrong user source… not sure how that even happened