farm.adventblocks.cc has an A (IPv4) record (91.244.197.122) 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://farm.adventblocks.cc/.well-known/acme-challenge/letsdebug-test": EOF
Trace:
@0ms: Making a request to http://farm.adventblocks.cc/.well-known/acme-challenge/letsdebug-test (using initial IP 91.244.197.122)
@0ms: Dialing 91.244.197.122
@212ms: Experienced error: EOF
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.
91.244.197.122: Fetching http://farm.adventblocks.cc/.well-known/acme-challenge/HIBPdkh9P5rcqPpFX1MszHwl4_FIXtd3lVFkGsrbCxc: Error getting validation data