@liampelot Due to increased security and possibly due to an unresolved bug affecting PMS and MacOS 10.14 and older, your attempts to regain access to a working version of PMS have gone awry. I realize how that’s troubling, and I can help.
In another topic, I show How To Sign-out PMS on a MAC, Downgrade, and Reclaim
You will be downgrading to the last working PMS I know works on all MacOS 10.11.0 or greater.
If your computer is running MacOS 11.0.0 (Big Sur) or newer, you can upgrade PMS after a few days of being happy 
Again sorry it’s been a struggle, but these hiccups are being sorted by MovieFan.Plex.
