The UCR templates of univention-ssl have to be python3-compatible.
univention-ssl (13.0.0-7) c831db7b21e7 | Bug #51022: make UCR templates compatible to python3 univention-ssl.yaml 9568d934faeb | YAML Bug #51022
Verified: * Code review * Advisory * Package update & functional test (logrotate)
<http://errata.software-univention.de/ucs/4.4/516.html>