Oh ■■■■, I did make the mistake to change my password after the breach notification and I NEVER EVER should have. As a lot of people posted, I too cannot get into my server, the one I spend hundreds of hours building custom collections etc.
I’m running my server in a docker on synology. If I connect locally and selecting the server, I get the Not authorized You do not have access to this server. You may be able to claim it by choosing “Open Plex…” from the Plex menu in the macOS menu bar or Windows system tray.
No options to reclaim or do anything else
and finally, when the plex is working again on all devices, stop the duplicated docker and restart the original docker. Everything worked fine locally, but https://app.plex.tv/ complained about the server being not reachable and suggested enabling secure connections.