~/letsencrypt# ./letsencrypt-auto
Updating letsencrypt and virtual environment dependencies.......
Running with virtualenv: /root/.local/share/letsencrypt/bin/letsencrypt
An unexpected error occurred:
AttributeError: 'NoneType' object has no attribute 'lower'
Please see the logfiles in /var/log/letsencrypt for more details.Und nun?