Power was out for 5 minutes or so. Power came back on, and wifi, and the sonos. Sonos sees the system, sees my music services, sees the list of local radio stations. But absolutely nothing will play. Whether it's a TuneIn Radio station, or music on google play or pandora, I get an error that "can't play [song], can't connect to [service]".
I even tried reauthorizing google play. No help.
Best answer by Airgetlam
Try unplugging your Sonos speakers, then reboot your router. Once the router comes back up, plug back in your Sonos speakers.
The router may not have come up "clean", you're basically resetting it again.