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.
A timeout was experienced while communicating with quanqiu.group/106.15.121.65: Get https://quanqiu.group/.well-known/acme-challenge/letsdebug-test: context deadline exceeded
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
@443ms: Server response: HTTP 301 Moved Permanently
@443ms: Received redirect to https://quanqiu.group/.well-known/acme-challenge/letsdebug-test
@444ms: Dialing 106.15.121.65
@10000ms: Experienced error: context deadline exceeded
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 https://quanqiu.group/.well-known/acme-challenge/fRauIhllPx9IjvpT3fbhUrhWZl-COUf8RRCFnfv864E: Timeout after connect (your server may be slow or overloaded)