www.peritia-itc.de has an A (IPv4) record (85.88.29.82) but a request to this address over port 80 did not succeed. Your web server must have at least one working IPv4 or IPv6 address.
Get "http://www.peritia-itc.de/.well-known/acme-challenge/letsdebug-test": dial tcp 85.88.29.82:80: connect: connection refused
Trace:
@0ms: Making a request to http://www.peritia-itc.de/.well-known/acme-challenge/letsdebug-test (using initial IP 85.88.29.82)
@0ms: Dialing 85.88.29.82
@32ms: Experienced error: dial tcp 85.88.29.82:80: connect: connection refused
A test authorization for www.peritia-itc.de to the Let's Encrypt staging service has revealed issues that may prevent any certificate for this domain being issued.
85.88.29.82: Fetching http://www.peritia-itc.de/.well-known/acme-challenge/YiZl9CuwkyYldOokgBkFMXar0D6KrSUuJ49m85TRkYA: Connection refused