imagineclan.de has an A (IPv4) record (134.255.225.70) but a request to this address over port 80 did not succeed.
Get http://imagineclan.de/.well-known/acme-challenge/letsdebug-test: dial tcp 134.255.225.70:80: connect: connection refused
Trace:
@0ms: Making a request to http://imagineclan.de/.well-known/acme-challenge/letsdebug-test (using initial IP 134.255.225.70)
@0ms: Dialing 134.255.225.70
@88ms: Experienced error: dial tcp 134.255.225.70:80: connect: connection refused