Reboot your phone.

Restart of phone did not work, unfortunately.  

Try removing Spotify from the Sonos app and re-adding it. You can also try uninstalling and reinstalling the Sonos app.

There is another thread discussing this 

No solution at time of writing 

Thank you. Still no resolution to the problem on that thread either. 

Hi @Kkhaus et al

We now consider this issue resolved. If you continue to see no results when searching for Artists on Spotify, I recommend you get in touch with our technical support team directly. Thank you.

This is happening again.

So, did you get in touch with Support, as requested?

Problem is still happening indeed, I can search Albums, Songs and Playlists but no Artists...

Same. This is dumb.

Hi @Kkhaus et al

We believe this issue has, again, been resolved and we can no longer reproduce it in our own testing. If you do continue to see this issue, however, please get in touch with our technical support team to report as much. Thank you.