1.9.6.4401 beta Plex Pass release has just been made available
Please download from https://plex.tv/downloads
If there is still a problem, please provide logs and if possible a short clip from the video that also gives rise to the error
See
https://support.plex.tv/hc/en-us/articles/201643703-Reporting-issues-with-Plex-Media-Server
https://support.plex.tv/hc/en-us/articles/200250417-Plex-Media-Server-Log-Files
