My iPhone's Files-app used to connect to my standalone Samba-server (running on a FreeBSD-14 computer). It was not entirely worry-free, but it worked most of the time. Not any more. With Samba-4.19.4 (and the just-installed 4.19.6), I get the "Unknown Error" message on the phone, and the following entries in the Samba's own logs on the server: rpcd_classic version 4.19.6 started. svcctl_init_winreg: Could not open...
Originally asked by Mikhail T. on Stack Exchange (superuser) (CC BY-SA 4.0).