Let's Debug

Test result for www.fleet.org using http-01

www.fleet.org has an A (IPv4) record ( 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://www.fleet.org/.well-known/acme-challenge/letsdebug-test: EOF

@0ms: Making a request to http://www.fleet.org/.well-known/acme-challenge/letsdebug-test (using initial IP
@0ms: Dialing
@111ms: Experienced error: EOF
A test authorization for www.fleet.org to the Let's Encrypt staging service has revealed issues that may prevent any certificate for this domain being issued.
Fetching http://www.fleet.org/.well-known/acme-challenge/E7REOo5f1wtfWtKgYFOXFsGHmEtS5o6JxrYYiQhe-PE: Error getting validation data

Submitted Jun 3 04:35:42 2019. Sat in queue for 2ms. Completed in 8s. Show verbose information.