I've been using Amazon Music for some time. I've the app on my phone, fire tablet and laptop as well as linked to my Sonos system. It's all been working fine until today. Trying to use AM on Sonos, a message appears saying to pause it elsewhere before it can be used via Sonos. It's not being used elsewhere! I realise the plan I have means it can only be used on one device at a time so checked the other devices: they're not playing. Any help?