look in /var/lib/plexmediaserver/Library/Application Support
If those files are your username and group, then you need a customization override
- Look at the file for anything which looks unique to you.
- Delete /etc/systemd/system/plexmediaserver.service.
- Create the new override in /etc/systemd/system/plexmediaserver.service.d/override.conf
It looks like this:
# Change Plex default variables
[Service]
User=YourUsernameHere
Group=YourGroupHere
#
# put other changed **Variables**here (UMask, TMPDIR, etc)
#
- Save the file (will be owned by root)
- systemctl daemon-reload
- systemctl restart plexmediaserver