I’ve been using Sonos and controlling it from my phone for over 1 year. last week I receive a “netwrok problem detected” error when “I sign in to use new features” on the bar at the top of the app or when I check for updates in system updates. I run an iPhone XR with iOS 13.2. The Sonos is up to date. The Sonos app runs correctly from other iPhones in my house.