I have several Sonos' amps and connects, I listen to my Amazon Prime account quite a bit. 

For the last month or so, it will work just fine, then after a playlist is over (from "My Music") and I try to go to a new playlist I will get the error "Your Amazon account is missing required information..."

There is nothing wrong with my Amazon account, all Sonos units are updated.  I can listen to my Amazon Music account on my desktop (not Sonos) with no issues.

I can even play my Amazon Music over my kitchen Sonos through Alexa. 

I have removed and reinstalled my Amazon account multiple times.

What is going on?  This is very frustrating, especially for how much I have invested in this system.