I can't get Echo dot to connect up with my sonos - can anyone help?

Same here, tried re-booting, re-installation etc but still having the same problem. If I ask Alexa to play songs by an artist the Echo plays it fine but when I say play music by artist in the kitchen it says ‘cannot find songs by that artist’ even though it has just played it and I have an active Amazon Music account! I bought my Echo over a month ago and it’s worked perfectly until now; help, it’s driving me nuts!

I’ve been liaising with Amazon regarding this and now have an explanation of sorts. I signed up to a £3.99 Amazon Unlimited Music subscription which only entitles me to use it on my existing Echo Dot and one external speaker; apparently because I play my music via the home wi-fi network to several sonos speakers this is classed as multiple usage and requires me to upgrade my subscription to the £9.99 unlimited devices option! I asked why the system has just started malfunctioning after a month of faultless performance but they couldn’t provide an answer. Obviously just a ruse to get a higher monthly subscription from us Sonos users! I haven’t yet upgraded so I can’t say whether this does resolve the issue; still considering my options!