I got the same problem when my son changed accounts on the Alexa app.  When I went back to my account, the problem started happen6 and I have not been able to use it.  I have a Sonos speaker, so I was able to connect Pandora through there and my Alexa as well.  I just say Alexa, play whatever and it does.  I can also control my stations on the Sonos app. ... View more