corp.networkingtechnology.org has an A (IPv4) record (79.132.230.60) 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 corp.networkingtechnology.org/79.132.230.60: Get "http://corp.networkingtechnology.org/.well-known/acme-challenge/letsdebug-test": dial tcp 79.132.230.60:80: i/o timeout
Trace:
@0ms: Making a request to http://corp.networkingtechnology.org/.well-known/acme-challenge/letsdebug-test (using initial IP 79.132.230.60)
@0ms: Dialing 79.132.230.60
@10001ms: Experienced error: dial tcp 79.132.230.60:80: i/o timeout
A test authorization for corp.networkingtechnology.org to the Let's Encrypt staging service has revealed issues that may prevent any certificate for this domain being issued.
79.132.230.60: Fetching http://corp.networkingtechnology.org/.well-known/acme-challenge/WOheQsQNUVxmM-KafqUBAPf6rf-f3T0MjgM9-UjU__0: Timeout during connect (likely firewall problem)