Can you power off the devices for 5-10 secs and then power back on and retest.
I tried that, and the Office speakers are working, but now the Living Room speakers are having the same problem.
In that case please look at my article:
OK - I did this, and for now all is working. Thank you for your help. Fingers crossed!
Ugh! It’s still happening
Maybe update to the Jan 28 firmware and App?
Once done verify all are running the new versions. Power all Sonos down, reboot router and power back up.
If that works for you for a while and the a ts up again consiider using static/ reserved IP addresses.