Several folks have noticed that their Samba server stopped serving files to their Sonos v1 Music Library after upgrading to Ubuntu 22.04. After a whole lot of tinkering I found a fix:
add “unix extensions = no” to the global section in the smb.conf file. That’s needed in addition to enabling SMB or NTLM v1 protocol, something that’s been necessary for a couple of years now.
I have a couple of links with more info and will post them as a reply.