I just upgraded to Spotify Premium,a nd updated my Sonos to the current OS, and it still will not link the two. I have a playlist that a friend made for me on her Spotify, and I can see it, but it will not let me play it. Advice?
Be sure to follow the steps on this page to link your Spotify account with your Sonos speaker.
If it's still not working, let us know if you are trying to stream via Spotify Connect within the Spotify app, or via the Sonos app? We'd also like to know if it's only your friends playlist which refuses to play.
Let us know what you can find. Looking forward to your reply.