This has probably already been asked, but I tried putting "The OS on this device is no longer supported" into the search tool and nothing came back so I’ll ask anyway…
I still have a couple of old devices which I manage using the S1 app on my phone, which is an Android-based Moto G4, running Android 7 (kernel version 3.10.84).
When I start up the Sonos S1 app, I get a banner at the top saying "The OS on this device is no longer supported", and providing a link to a Sonos article that says that the S1 app requires Android 5, 6 or 7.
Any suggestions how to resolve this? I also have the S2 app installed on the phone, but even if I make sure that none of the S2 components are running (by rebooting the phone before running the S1 app) it still gives me the message.
It’s not an entirely trivial error report, because it stops me from doing most of the things that I want to do, such as adding a radio station - that is not allowed by the app if your phone is deemed to be “too old” - even if it isn't!