Sorry, didn't work:
Certbot failed to authenticate some domains (authenticator: webroot). The Certificate Authority reported these problems:
Domain: m-it.care
Type: connection
Detail: 81.169.145.93: Fetching http://server.bc9xamf4lhwkdxiy.myfritz.net/.well-known/acme-challenge/_X4RYYcBAf6PVDe1EUEFu3cgOQx7UGEqrmSDYnlmQlU: Redirect loop detected
Hint: The Certificate Authority failed to download the temporary challenge files created by Certbot. Ensure that the listed domains serve their content from the provided --webroot-path/-w and that files created there can be downloaded from the internet.