Please fill out the fields below so we can help you better. Note: you must provide your domain name to get help. Domain names for issued certificates are all made public in Certificate Transparency logs (e.g. crt.sh | example.com), so withholding your domain name here does not increase secrecy, but only makes it harder for us to provide help.
http://sso.smartidentity.nicotechnologies.com/.well-known/acme-challenge/check-your-website-dot-server-daten-dot-de
207.45.186.188
Inline-JavaScript (∑/total): 0/0 Inline-CSS (∑/total): 0/0 404
Html is minified: 100,00 % 0.387
A
Not Found
Visible Content: Not Found The requested URL was not found on this server. Additionally, a 404 Not Found error was encountered while trying to use an ErrorDocument to handle the request.
Date: Wed, 24 Feb 2021 10:27:21 GMT
Server: Apache
Content-Length: 315
Connection: close
Content-Type: text/html; charset=iso-8859-1
Only Apache answers.
Looks like you check the wrong system, not that system, that's online.
PS: Or you have a proxy or something else in front of your server.
It seems like the domain name you're using has a different meaning—somehow pointing to a different server—on your own network compared to the rest of the Internet. That could be because of split-horizon DNS (i.e. having different DNS records for inside and outside the network), or a reverse proxy, or something else.
It will definitely be tricky to solve this until you can figure out which machine is which, and why it looks different from the inside and the outside! (For example, you might be running Certbot on the wrong machine, or people outside your network might not be connecting to the same machine you intended.)
