Can't broadcast to Sonos One with Google Assistant

Hey everyone,

I have a new Sonos One that works great aside from this issue I am having with Google Home/Assistant integration. 

When I try to broadcast a message to the Sonos One located in the bedroom (either through the Assistant app or via voice command to my Google Nest Mini, which is in a different room), I get an error that there is “nothing named X in your account”, or something to that effect, so the message is unable to be broadcast. This happens regardless of whether I try to broadcast to the room (“Main Bedroom”) or to the device itself (“Main Bedroom speaker”), confirming the exact name of the room and speaker, respectively. Other Assistant features seem to be working fine; for instance, I can make commands from the Sonos One using “Hey Google” and play music on the Sonos One with a voice command from the Nest Mini.

There are several old threads on this issue, all of which seem to point to this sequence in the Sonos app as a solution: Settings>Room Settings>(Select Room)>Voice Services GA>Google Assistant Settings>Default Media Output ---- Select the appropriate Sonos speaker.

However, these threads are so old that this sequence no longer exists in the Sonos app, so it’s not possible to try. I have tried unlinking Sonos and re-linking as well as disabling and re-enabling Google Assistant. In the Sonos app, I have also selected the Sonos One as the default speaker for music.

I would greatly appreciate any thoughts from the group! Even simply confirming whether I should be able to broadcast audio messages to the Sonos One through Google Assistant would be helpful.

Thanks in advance!