Best answer by Jeff S
There's some wireless interference showing up between your BOOST and PLAYBAR. This is likely causing the insufficient bandwidth errors. Please try changing the wireless channel your Sonos system is using.
Try each of the 3 channels for a little while and see which is best. It may also help to look around and in between your Sonos speakers for any third party wireless devices. Try moving any such devices away from your Sonos speakers and see if that helps.