quanqiu.group has an A (IPv4) record (106.15.121.65) 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://quanqiu.group/.well-known/acme-challenge/letsdebug-test: dial tcp 106.15.121.65:80: connect: connection refused
Trace:
@0ms: Making a request to http://quanqiu.group/.well-known/acme-challenge/letsdebug-test (using initial IP 106.15.121.65)
@0ms: Dialing 106.15.121.65
@247ms: Experienced error: dial tcp 106.15.121.65:80: connect: connection refused
A test authorization for quanqiu.group to the Let's Encrypt staging service has revealed issues that may prevent any certificate for this domain being issued.
Fetching http://quanqiu.group/.well-known/acme-challenge/hBU5nuoGtvhkpFI7V5II-T8WxQJ5eMMG9IyjELAh_ME: Connection refused