www.qimiao.cloud has an A (IPv4) record (183.141.66.221) 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 www.qimiao.cloud/183.141.66.221: Get "http://www.qimiao.cloud/.well-known/acme-challenge/letsdebug-test": context deadline exceeded
Trace:
@0ms: Making a request to http://www.qimiao.cloud/.well-known/acme-challenge/letsdebug-test (using initial IP 183.141.66.221)
@0ms: Dialing 183.141.66.221
@10000ms: Experienced error: context deadline exceeded
A test authorization for www.qimiao.cloud to the Let's Encrypt staging service has revealed issues that may prevent any certificate for this domain being issued.
183.141.66.221: Fetching http://www.qimiao.cloud/.well-known/acme-challenge/5pc75g3n4T9MwiiGVkPTdmzfk6401kHlhYqWst2TtxE: Timeout during connect (likely firewall problem)