New to me Sonos One - completed a factory reset - sonos app finds the speaker & asks if i want to connect - Proceed with connection and the app says that a software update must be completed in order to proceed.  Successfully initiate the upgrade but it never completes.  I have let it run for over 24 hours.  I have re-booted my modem, my souter and completed another factory reset and got the same outcome.  SONOS Cust Serv (after waiting 90 mins to connect - that should tell you something - has me do it all again and surprise - same outcome ) conclude that the issue is my EERO Router and extenders.  Interesting - I have 8 other speakers that work perfectly well on my network.  Sonos you can’t have it both ways.