Exactly what it says. We don’t have any “old” S1 devices connected. We have 9 zones, and they all show up on our iPhone Sonos controller app (the gold icon, S2 app), but 2 of them do not show up on the macOS app. It happens that the 2 that are missing are the first 2 alphabetically but not sure that has to do with anything.
Yes, I have rebooted _everything_ repeatedly, before you ask.
Sonos used to work amazing with no problems. We had over 10 zones including 2 playbars, 2 subs, 4 play 3’s, 3 play 1’s and 2 play 5’s. We got rid of 2 of them because they were “old” S1 devices. Our house has Google Wifi mesh networking. And we have the Boost. This is just so frustrating that you are always messing with everything, and now it’s messed up.
I’m on macOS 10.15.7. Please don’t say to upgrade to Big Sur b/c I’m not ready to do that yet.