My Sonos totally useless had for many years to play my music stored on iMac now cannot find it music a very expensive useless junk I believe since update everyone moaning all I get is emails from Sonos for me to purchase more useless junk sort this out
Roger
Roger. Can I buy your “usless junk” at a reduced cost since it doesn't work? 
But, you probably have SMB v1 enabled on your music server. Sonos has stopped support for SMB v1 like many other manufacturers. See the following post that should get you access to your library again:
and this:
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