Music library not available

First weeks I could listen to my Spotify playlists I downloaded on my watch without issues.

However, when I want to start music now it says: "music library not available. close app"

Both when accessing from 'hold down' as when I access via the music menu => providers => spotify. 

- close en restart connect and watch doesn't work

- reinstall Spotify doesn't work, and when I do it doesn't ask me to link Spotify again

- restore settings doesn't work.

Anyone else experienced this issue and knows how to fix it? 

Thanks in advance