Plex Media Sever can be installed from the Software Center.
However after installing and launching the app (a web link to localhost:32400), you are presented with a 404.
Installing PMS installs the binaries and .desktop file for the service web interface.
But it doesn't actually start the PMS daemon in the background.
It is necessary to run:
sudo systemctl enable plexmediaserver.service
sudo systemctl start plexmediaserver.service
From terminal to do so.
Is there anyway to automate this final step of the process when installing?