Comment 4 for bug 1886114

The pathway by which this error can occur, is installing package "samba-common-bin" on focal20.04 with no previous samba installation ... -- although there is a /usr/lib/tmpfiles.d/samba.conf installed, the package installer seems to end up creating the above error due to not having /run/samba when trying to start something samba-related using smb.conf provided in samba-common...
Appears, this particular state can be workarounded by manually creating /run/samba then installing samba-common-bin, then on next reboot /run/samba is created automatically and error does not recur...