I suspect that my Port is causing problems. I am able to “cast” music to it from my iPhone (e.g. from the Amazon Music app) but it is not playing when I attempt to start music directly from the Sonos App. It appears as though it is working on the app - for example, when I play music through all my speakers and they are all playing on the app (little verticle lines going up and down next to each room/speaker) but no sound comes from the Port. 

I frequently get the “Unable to connect to a device. Try again later.” error message when navigating the app. 

I’ve tried checking for system updates (it says it’s up to date), updating the app (current version 12.2.2), unplugging/re-plugging the Port from the system… 

Thanks for the help, I hope!