The Plex Dance didn’t help. I had to completely delete the PMS from my NAS and also remove the Shared Plex Folder on the NAS and do a clean new installation.
I tried it without deleting the Plex shared folder but that did only led to PMS being “halted” on the NAS. Manual restart only worked for a few seconds then PMS was halted again.
The above also solved my below problem " iOS Plex App shows Movie Library as “Server currently not available” but Music, Photos are available":
https://forums.plex.tv/t/ios-plex-app-shows-movie-library-as-server-currently-not-available-but-music-photos-are-available/588958?u=adrian70
Now Plex runs fine again on my NAS and iOS Plex App shows everything as it should.
