Same experience here with the latest upgrade. I also have some Marantz (HEOS) - no problem. Firestick driving a Sonos Beam - No.problem. And of course native Amazon devices - no problem. So looks like BluOS side API to Amazon got AFU'd in the upgrade. Or the upgrade is pounding the Amazon gateway into overload with what would resemble a DDOS attack. Either way, it all points back to BluOS.
Bluesound
Anyone getting this message? Player notification remote service error internal server error.