I can't add Sonos to Google's Home or add Google Assistant to my Move.
Both approaches fail after giving my Sonos credentials, telling me to register speakers to my account. I have 10 speakers registered to this Sonos account!
I used to have it all working, specifically allowing me to use my Sonos Port as the default speaker for a bike mini, in my kitchen.
This all broke, so I removed the integrations and started again. But it added my V1 Connect, not my V2 system.
So I moved my V1 Connect to a new Sonos account, leaving all my V2 stuff on the original account.
Now I get this issue when trying to add Google Assistant integration to my V2 system account.
Best answer by mashton
I've fixed this.
Problem was that the domain ws.sonos.com was being blocked by my nextdns.io DNS filter.
Added that domain to the allowlist and we are back in business.