Yep, what a mind bender.  The real fix I found was to delete the app, if a device was not checking in then press and hold the button on the speaker until Red, power cycle your router, once router is back up go download the app and install, open new Sonos app and select existing setup and hopefully you will be prompted to complete the setup for a new device found.  In addition, in the past I never had to put the 8 digit # under the speaker but now I do.  Good luck and please if it says Try Again then try again and again, I had to try up to 4 times for one device.

I updated to the new app this afternoon and could not work anything out, its awful!  I didn’t take time to look for long because it is not user friendly, I couldn’t find anything and became so frustrated I turned everything off,,,,,

SONOS, please remedy this disaster. Myself and all your other customers pay decent money to access what had previously been a great app and way to play music.  FIX IT!