nbs.sec-comms.net has an A (IPv4) record (82.13.200.226) 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 nbs.sec-comms.net/82.13.200.226: Get "http://nbs.sec-comms.net/.well-known/acme-challenge/letsdebug-test": context deadline exceeded
Trace:
@0ms: Making a request to http://nbs.sec-comms.net/.well-known/acme-challenge/letsdebug-test (using initial IP 82.13.200.226)
@0ms: Dialing 82.13.200.226
@10000ms: Experienced error: context deadline exceeded
A test authorization for nbs.sec-comms.net to the Let's Encrypt staging service has revealed issues that may prevent any certificate for this domain being issued.
82.13.200.226: Fetching http://nbs.sec-comms.net/.well-known/acme-challenge/NtFwhLz2ilNCG6MoY82mR6HbM8zKfhxZEBGExjmc0Go: Timeout during connect (likely firewall problem)