I can not connect to my music library on Mac. Access is denied

On PC browsing to library location will not work. What worked for me was indicating the location as if it were a networked location i.e. \\mypc\wherever library is located. 
Library back working again. 

I lost my connection as of yesterday, May 20.  I’m on an HP PC.  This is the error I get:

I am a Mac user- also on 12.7.5 and have lost access to music library since latest Sonos update. I hope this is sorted before mid June. 

22nd May.

I updated to MacOS Sonoma two days ago. No library in Sonos settings!

I thought it was the Mac update that caused it. Now I know better 

What a complete and utter shambles.  Shame on you Sonos.

Same for me, all disappeared and cannot be updated again, neither on Mac, iPhone and iPad

I don’t have a stereo equipment anymore, so fully depending on SONOS, expensive gear hanging everywhere and useless. I only can listen my music by VLC on my Mac! What a crap!!

If SONOS doesn’t fix this, are there alternatives’ Thanks

Same here...as per Sonos suggestions I re-set my firewall and still cannot play my music library. Very sad SONOS!!!

I am getting the exact same problem, on Windows. A weird message about a shared folder, which it isn’t, and no access to my music library, the primary reason I use Sonos. It did an update right before, which displayed an error message with no details, but when I tried again said that it was done. I uninstalled and reinstalled and had the exact same sequence occur.

Very disappointed customer here.

Same problem, on MacBook. I buy my own music and have over 600 GB of music I can no longer play through my SONOS speakers. If they do not fix this I will politely ask for a full refund on all of my Sonos equipment, as they have rendered it useless.

Same!