Adding new Sonos One throws everything off

I have an existing Sonos setup with 4 speakers that is working fine. I had another Sonos One in my closet that I wanted to bring out.   I factory-reset the device, went through 4 attempts to join it to my network (all failed).

Worse, the app on my Mac is now all wonked out.  Even resetting it doesn’t work.

My controller is on iOS and it is the updated Sonos app.  The other app is on MacOS Monterey.  I rebooted my iPhone, rebooted the Sonos One, no luck.

All I did was try to add a Sonos One speaker to an existing setup.  

This error condition should not throw everything into disarray like this.

I’m a bit frustrated as this is not the only time I’ve experienced trouble like this.  Can anyone shed some light on how I can fix this and/or why this happens?

Thanks!