I mostly get the error "That song is no longer included in your Amazon Music streaming service. Please try another song." though every 5-7th one gives me the "Unable to play 'XXX' - the song is not encoded correctly." error.
These are purchased and uploaded songs, not free prime or unlimited songs. They stream and download perfectly through Amazon's mobile app, web browser, and desktop players.
I have reauthorized my Amazon account through Sonos with no change. I have removed the Amazon service and re-added it completely to Sonos with no change. Before and after those steps it is the same songs that play and fail.
The songs failing today played through Sonos three days ago, before I updated. What is the next step to correct this?
Best answer by Smilja