My Sonos device told me that I suddenly needed to re-authorize it with Spotify. Had worked as a charm for 5 months before.
When I came to the step where I should press Allow (after having logged in with my Spotifyuser) I got an 'Unknown Error' message saying 'Ops, something went wrong. Please try again later'
I've tried for three days now, also with different browsers.
Today I finally triedwith another friends Spotify-account instead, and it worked!
So, the problem is something with my account.
But it is a Premium account, and has worked perfectly for 5 months (running Sonos, much longer as a Premium user without Sonos)
Can someone check what is wrong with the account?
The error must be on the Spotiify-side of this.