Music licenses change over time, so the right to play them varies over time. You don’t “own” that music, you just own a license to play it, and that license can be revoked by Apple whenever the music rights owner tells them to.

If you search Apple Music for that missing album I would guess that it no longer shows up, as it has been removed from their catalog.

Thank you for your reply. The Strange fact is I still can play it with the apple music app, from library, with no problems. Only when i enter the apple music library from the sonos app it happens.

Rami

I am having this issue as well over the past two days. I am also dealing with frequent errors and disconnects from Apple Music in Sonos S2, while it works fine in the Apple Music app. It will play correctly for a few songs, sometimes 2 sometimes 10, but then will skip the rest and say Apple Music is unavailable.

So far I have

-Removed Apple Music as a service

-Re-added Apple Music as a service

Sonos Status shows Apple Music is fully functioning, but I don’t think that’s actually the case.

Thanks, at least i am not alone in this... 

No, you are not. Same problem here since yesterday.

I have started having the same issue the past couple of days with songs greyed out and on occasions get “We’ve ran into a problem. Try Again.”. I also noticed I was updated to Version 13.0 several days ago.  Might be time to disable auto updates. 

Let's hope someone from sonos support is aware of the problem. 

Can someone share a specific track or album that they are unable to play?

Just to nam few:

Arvo part - Arbos

Anouar brahem - khomsa

Ketil Bjørnstad - water stories

Anja lechner - komitas, gurdjieff & mompou

Garbarek & hilliard ensemble - officiun novum

I found some of these in the US catalog, but I have no access to the Israeli Apple Music catalog.

The tracks are only grayed out in my library. When I look them up on apple music I they are not grayed out and I can play them.

Same with me. No problem playing from apple music using "search", cant play the same album from the library ("my music"). 

I see the problem is solved. Thank you all

Yep, same here. Problem solved.