bbb.mahale-ggmbh.de has an A (IPv4) record (220.127.116.11) 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://bbb.mahale-ggmbh.de/.well-known/acme-challenge/letsdebug-test": read tcp 18.104.22.168:52712->22.214.171.124:80: read: connection reset by peer
@0ms: Making a request to http://bbb.mahale-ggmbh.de/.well-known/acme-challenge/letsdebug-test (using initial IP 126.96.36.199)
@0ms: Dialing 188.8.131.52
@160ms: Experienced error: read tcp 184.108.40.206:52712->220.127.116.11:80: read: connection reset by peer
A test authorization for bbb.mahale-ggmbh.de to the Let's Encrypt staging service has revealed issues that may prevent any certificate for this domain being issued.
18.104.22.168: Fetching http://bbb.mahale-ggmbh.de/.well-known/acme-challenge/OOwTVyC7sKBRog7tr2QICgSKsORS4o1Y0QdcUZmB8dg: Connection reset by peer