agenti.italpannelli.it has an A (IPv4) record (46.37.225.37) 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.
A timeout was experienced while communicating with agenti.italpannelli.it/46.37.225.37: Get "http://agenti.italpannelli.it/.well-known/acme-challenge/letsdebug-test": context deadline exceeded
Trace:
@0ms: Making a request to http://agenti.italpannelli.it/.well-known/acme-challenge/letsdebug-test (using initial IP 46.37.225.37)
@0ms: Dialing 46.37.225.37
@10002ms: Experienced error: context deadline exceeded
A test authorization for agenti.italpannelli.it to the Let's Encrypt staging service has revealed issues that may prevent any certificate for this domain being issued.
Fetching http://agenti.italpannelli.it/.well-known/acme-challenge/pHeGxAIaNr_jBYuh2QFHlkR4kZ2Y8ylGooGUCh6Mkig: Timeout during connect (likely firewall problem)