IMO this is a huge issue and I’m surprised we don’t have a fix for it yet.
Samba is a popular service and an update breaking it is very disappointing.
I have enabled more logs options, and following message is spammed in log.samba-dcerpcd file (whose file size is now about 40 MB!) whenever I try to access my shares.
../../source3/rpc_server/rpc_host.c:2940(main)
main: messaging_init() failed
I have tried all suggested workarounds to no availability!