Anyone else getting this pop up when clicking on the forum home page. I can get in by clicking on a subforum and navigating backwards to where I want to be.
I found what caused the issue. There was a misconfiguration in a file from updates done a few days ago. The server was still running on the cached copy of the file and wouldn’t load the new one until the Apache service was restarted. That happened right around the time @Isorg said the issue started. (1 hour time zone difference)