kdatest.com has an A (IPv4) record (162.114.8.73) 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 kdatest.com/162.114.8.73: Get "http://kdatest.com/.well-known/acme-challenge/letsdebug-test": context deadline exceeded
Trace:
@0ms: Making a request to http://kdatest.com/.well-known/acme-challenge/letsdebug-test (using initial IP 162.114.8.73)
@0ms: Dialing 162.114.8.73
@10001ms: Experienced error: context deadline exceeded
A test authorization for kdatest.com to the Let's Encrypt staging service has revealed issues that may prevent any certificate for this domain being issued.
162.114.8.73: Fetching http://kdatest.com/.well-known/acme-challenge/ZtpR0EuHCvhwxgTjNsoDadn8CML9d1mVmGTwqPghvdQ: Timeout after connect (your server may be slow or overloaded)