Selecting something from Sonos Radio in the app (Android) produces the pop up message “Unable to play ‘Sonos Radio’. Connection to ‘Sonos Radio’ lost”. Suggests I check my internet connection. Same message on another device.
In the Windows app it also fails, but suggests that I might need to reauthorize my Sonos devices. Trying that in the Android app under the Sonos Radio service setup, I just get “failed”.
So I tried the usual thing - unplug and re-plug the speakers to reboot. Then try re-authorizing Sonos Radio again. Now it works.
Typical Sonos. Got to love those informative error messages. I hear Sonos consulted the ancient Greek Oracle of Delphi for advice on proving clear messages. :)