Can you look in System Settings (via the cog wheel in the top right hand corner), then Manage>Network>Manage Network

My manage page is also blank on the current release.

What happened to the original WiFi settings?

If you just switched to a new router, SSID and password you can just go back and use the old SSID and password on the router and Sonos should pick it up.

UKMedia, the empty screenshot from my previous message Comes exactly from the path you describe.

I didnt change my router or network. Wifi stop working progressively on each sonos five, and now only those with ethernet are working.

Terribly frustating, it worked for years.

I think that you'll need to call Sonos support in that case.