I am running a dedicated server (QNAP) with my PLEX server on a Win 10 machine. Running a single network drive with audio in it. Plex has finished loading all data and Sonos Win 10 Desktop control shows it but when I select a song or album to play I get a popup error "Unable to play xxxxx - unable to connect to Plex".
I have both FLAC and MP3 files on the drive and nothing works. There is also no album covers showing either.
And it might be important, but I am not running a standard flavor of Sonos (controllers or unit SW).