Hi @John_296,
I’m sorry to hear that you’re having trouble playing your music library tracks on Sonos.
The error you’re receiving, ‘Unable to play… cannot be found’, is generally displayed when either the track doesn’t exist anymore or when the share path is incorrect. Since you play the track, I would assume that the share path is incorrect, however you say you can play other tracks that aren’t ‘compilations. Compilations seem to be a feature from iTunes, used for grouping songs together from different artists (at least that’s what I can see on Google), so I’m not really sure why this would prevent these tracks from playing if it’s just a way to sort tracks.
I would recommend following our support article for Adding your Music Library to Sonos just to confirm that the library share path is correct. If it isn’t, then update the share and index your library to see if that resolves the issue. Otherwise, you should contact our support team for further troubleshooting. They have the necessary tools available to look into your system and help you resolve this issue.
I hope this helps!