Problem:
Caused by an regression Bug 52867 the joinscript 40univention-virtual-machine-manager-schema.inst fails due to schema installation, which caused the slapd start to fail.
slapd is not running anymore
Solution:
Possible temporary solution:
cp /usr/share/univention-virtual-machine-manager-schema/univention-virtual-machine-manager.schema /usr/share/univention-ldap/schema/
or
cp /usr/share/univention-virtual-machine-manager-schema/univention-virtual-machine-manager.schema /var/lib/univention-ldap/local-schema/
ucr commit /etc/ldap/slapd.conf
systemctl restart slapd.service
univention-run-join-scripts