Apple Music not working on Echo Dot

I have an Apple Music subscription which was playing happily on my Echo dot until this week when it won’t recognise Apple. I have unlinked Apple and then re linked again and selected Apple Music as my default. Still not working. I unplugged the Echo dot and then restarted, still not working. Please help. I’m away from my Echo for. Couple of days but will read responses then. Thank you.