While testing UCS 4.3-0 errata21 an installation pulled in univention-samba-local-config as an dependency.

During the installation I observed the following messages:
    univention-samba-local-config (12.0.1-1A~4.3.0.201802271540) wird eingerichtet ...
    Script: /etc/univention/templates/scripts/samba.local.config.py
    Traceback (most recent call last):
      File "/etc/univention/templates/scripts/samba.local.config.py", line 34, in <module>
        from univention.lib.share_restrictions import ShareConfiguration
    ImportError: No module named share_restrictions
    Multifile: /etc/samba/smb.conf
    Script: /etc/univention/templates/scripts/samba.local.config.py
    Multifile: /etc/samba/smb.conf



I assume that directly installing univention-samba-local-config will also result in the error.
My whole steps included adding a foreign repository and this is probably too much but if you are interested in this