As known, the https prevents the site from loading properly and displays a There is a problem with this website’s security certificate.
The issue is you self signed the certificate. You can validate it here: https://www.sslshopper.com/ssl-checker.html#hostname=https://www.echteinfach.tv
You need to use a cert from a recognized authority or remove HTTPS
I suggest http://www.startssl.com/ as it's free!