http://www.thekunit.com/install-plex-server-ubuntu-server/
Plex Media Server
Plex Media Server 501 Error on PS3
Seemed to have happened out of nowhere, just started getting errors. Came across this old post, but it seems to have done the trick. 1. Locate your Plug-ins directory (For me, this refers to the /var/lib/plexmediaserver/Library/Application Support/Plex Media Server/ directory.). 2. Delete the System.bundle and Framework.bundle directories. 3. Restart the media server.
