farm.adventblocks.cc has an A (IPv4) record (91.244.197.115) 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 farm.adventblocks.cc/91.244.197.115: Get "http://farm.adventblocks.cc/.well-known/acme-challenge/letsdebug-test": dial tcp 91.244.197.115:80: i/o timeout
Trace:
@0ms: Making a request to http://farm.adventblocks.cc/.well-known/acme-challenge/letsdebug-test (using initial IP 91.244.197.115)
@0ms: Dialing 91.244.197.115
@10001ms: Experienced error: dial tcp 91.244.197.115:80: i/o timeout
A test authorization for farm.adventblocks.cc to the Let's Encrypt staging service has revealed issues that may prevent any certificate for this domain being issued.
91.244.197.115: Fetching http://farm.adventblocks.cc/.well-known/acme-challenge/BoVIuoVicufjD4tJ3O3QMHYKyV5wX2M5aNm105aSjYI: Timeout during connect (likely firewall problem)