I have been trying to fix this for weeks now and its driving me mad.
I have just started using my sonos play:5 again after about 6 months and Im getting the error regular. I fix it, then a couple of hours later or the next day its back again.
when I click on a song its says cannot connect to xxxxx(insert song) because server cannot be found. I have been through this so many times i know whats going to happen next, if I click update library, it will say cant find (insert my name) computer.
So I unshare/ share/.. firewall on / firewall off... change the computer name / restart and I usually get it working again eventually.I think its the changing the computer name that helps the most?
My ipad and iphone work perfectly and I can see the songs I play from them in the queue of my computer controller. so it just seems to be the computer thats the problem running windows 10 BTW if that makes a difference .I have done a lot of reading about this problem in this community but haven't found a permanent fix.
Sonos if this is such a common problem why don't you put out a patch to fix it ? when it works its great but that isnt very often
Thanks for any advice.