The first thing I’d try is unplugging the Sonos devices from power, then rebooting the router. Once the router come back up, plug in the Sonos devices and give them a minute to boot before checking.
If that doesn’t work, I’d try wiring your Sonos to the router directly, and see if it then connects.
If those two steps fail, I would call Sonos Support directly to discuss it.
When you speak directly to the phone folks, there are more options available for them to assist you.
Ok. I tried that all before. No success. Of course connected to router the speaker connects. Wifi Connection is the problem.
i chatted yesterday also with Sonos help support. No success.
ok thanks. I will call Sonos Support today after work