Hi @Sleepylender360 & @User Mats,
I’ve just heard from our support team that there was a general Spotify issue where adding tracks to the queue failed, however this has been resolved after an update on Spotify’s side. It doesn’t look like it was effecting every device, so that’ll be why you were able to use your mobile devices but not your computers.
I’d recommend making sure the Sonos app and Spotify app are running the latest version (you may need to check your app store if they haven’t automatically updated) as well as making sure your Speakers are up to date.
If you’re still having issues playing Spotify, please submit a diagnostics within ten minutes of the issue occurring and contact our support team for further assistance.
I hope this helps!