I have a Sonos One and recently upgraded to a TP-Link_278 router. When I tap Update network in the Sonos app, it says Update the network settings for your products so they can connect to you wifi. Result is “unable to update these products, to add to network factory reset them.
Tap continue and it says Unable to update, factory reset. I do that and get the green flashing light that the instructions call for, but when I then tap the Update network setting I get the same result (Unable to update).