With a recent upgrade from a USB to an SSD for my system drive I elected to upgrade OMV to 3.0 and start using Docker for Plex.
Although Plex is running and displays all the old metadata (including thumbnails) from the OMV2 Plex addin, none of the media will actually render. This suggest a problem between the container and host permissions (or mappings) to the media directories. All the media is in shares with UID=0(root), gid=100(users), but I noticed the Plex config share was UID=0(root), gid=1000, so I chgrp :users in the filesystem and updated the Docker env PGID=100, but Plex still only displays thumbnails but can't render the actual media ("Unable to load photo"). I also changed PLEX_MEDIA_SERVER_USER from abc to root.
I have attached my Docker Plex config & logs in the hope someone with experience could point me in the right direction.