Sonos app crashes on Android 5.0.1 when selecting Spotify Playlist

[Serafijn62]

I recently had to upgrade my mobile phone (Samsung Galaxy S4)  to Android 5.0.1. Since then, each time I try to access the Spotify Playlist option in Sonos, the app crashes with the message "Unfortunately Sonos has stopped".

My partner has still got Android 4.4.2 on his identical phone, and has no such issue. Works ok on my Android tablet too (4.2.2).

Any suggestions how I could resolve this?  I don't know if it's Sonos or Spotify at fault. I've reinstalled both from the play store, but still no luck. And it's driving me mad!