chown www-data /opt/kivitendo-erp-$version/users /opt/kivitendo-erp-$version/templates
chgrp www-data /opt/kivitendo-erp-$version/users /opt/kivitendo-erp-$version/templates
+systemctl restart apache2
+
# call installation check
/opt/kivitendo-erp-$version/scripts/installation_check.pl