May be it is a different issue. If you follow the Plex Dance sequence it should be ok so long as no new recordings are added
https://forums.plex.tv/t/the-plex-dance/197064/2
if problem persists, get logs for time of error and screenshot
See
https://support.plex.tv/articles/201643703-reporting-issues-with-plex-media-server/
https://support.plex.tv/articles/200250417-plex-media-server-log-files/
and logs for the client app
https://support.plex.tv/articles/201869908-log-files/
