I can reproduce it!
May 11 14:55:30 vm5 systemd: Starting OpenLDAP Server Daemon...
May 11 14:55:31 vm5 slapd: tlsmc_get_pin: INFO: Please note the extracted key file will not be protected with a PIN any more, however it will be still protected at least by file permissions.
May 11 14:55:31 vm5 systemd: Started OpenLDAP Server Daemon.
May 11 14:55:31 vm5 esmith::event[15647]: LDAP_OTHER Unknown error at /usr/share/perl5/vendor_perl/Net/LDAP/Entry.pm line 267.
May 11 14:55:31 vm5 esmith::event[15647]: Error modifying cn=config
May 11 14:55:31 vm5 esmith::event[15647]: Action: /etc/e-smith/events/nethserver-directory-update/S10nethserver-directory-conf FAILED: 1 [0.759079]