Ah sure. Yeah, I fixed the problem. In one of the configuration files was a jüdisches-kinderheim.de - I didn’t notice it because the vhost this page was for doesn’t matters yet (this domain isn’t even registered). I removed it now and it works.
Thanks.
But I am a bit upset that it took me more than 5 hours to install certbot. Actually I had to remove my whole python installation and reinstall it because something went wrong (not sure if it is a CertBot or Apt problem). And if this problem occurs for other others I think they will keep HTTP on there websites.
A few months ago I already tried CertBot and got these problems and I just let the pages stay as they were because I didn’t had the time. Affording more than 5 hours is not possible for unimportant projects.
I think this point needs big improvement!