Synology Model?
DSM 6, 7, or 7.2.2?
Plex Media Server version?
Plex Media Server Versions
Which version of Plex Media Server was installed before the problem?
Which version of Plex Media Server is currently installed?
If you were running 1.40.x before, you cannot run 1.29.2 from Synology Package Manager. The two versions are incompatible and Plex will most likely crash. You need to run the current public, 1.40.5, or beta, 1.41.0, release.
Plex 1.40 introduced many database changes. It is not possible to fall back to a release before 1.32.1 (such as 1.29.2 in the Package Center).
Plex Data Folder Permissions
If the NAS is running DSM 7, perform the procedure in FAQ 32: Repairing the PlexMediaServer shared folder.
Depending on how the backup was restored, folder and file permissions may need to be reset. The procedure will ensure folder & file permissions are correct for the Plex data folder.
