Start with a full reboot, turn ALL Sonos off, reboot router, power Sonos back up.

Thank you Stanley. I have a mixed bag of new and old Sonos speakers. I have heard/been told the new Sonos app is not very compatible with the old speakers. They say use the Sonos1 app which means resetting everything and loosing your playlists and re subscribing to our services. Thank you for the recommendation. I have tried that with mixed results. Best Regards. Marc