So today, the problem is even worse. I can't log in to Amazon Music HD at all. Perhaps it's time to try Tidal!!
Exactly, I finally go Bluesound Tech this morning for same reasons of having (3) Nodes not working with Amazon Music. They have given me several options to remedy, but none work. Finally they admit, the following: "Amazon; specifically, the Amazon Web Services (AWS) server from which your Bluesound players pull data is experiencing an outage. We are in touch with our contacts at Amazon; Amazon hopes to have the issue resolved soon."
Really a bummer, I am having a wedding party at my house in a few days and need to stream my music. I was told to reload the Bluesound App after the fix from Amazon. Personally, this has been going on for a couple of weeks and now does not work at all! Ready for a new streamer.