dt.waimea.school.nz has an A (IPv4) record (122.56.184.10) 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 dt.waimea.school.nz/122.56.184.10: Get "http://dt.waimea.school.nz/.well-known/acme-challenge/letsdebug-test": context deadline exceeded
Trace:
@0ms: Making a request to http://dt.waimea.school.nz/.well-known/acme-challenge/letsdebug-test (using initial IP 122.56.184.10)
@0ms: Dialing 122.56.184.10
@10000ms: Experienced error: context deadline exceeded
A test authorization for dt.waimea.school.nz to the Let's Encrypt staging service has revealed issues that may prevent any certificate for this domain being issued.
Fetching http://dt.waimea.school.nz/.well-known/acme-challenge/af1lssLzKRWUvELUr800P4pG5spmXVca8_zKgXYOtf4: Timeout during connect (likely firewall problem)