cv-meet.kozow.com has an A (IPv4) record (24.144.23.95) 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 cv-meet.kozow.com/24.144.23.95: Get "http://cv-meet.kozow.com/.well-known/acme-challenge/letsdebug-test": dial tcp 24.144.23.95:80: i/o timeout
Trace:
@0ms: Making a request to http://cv-meet.kozow.com/.well-known/acme-challenge/letsdebug-test (using initial IP 24.144.23.95)
@0ms: Dialing 24.144.23.95
@10001ms: Experienced error: dial tcp 24.144.23.95:80: i/o timeout
A test authorization for cv-meet.kozow.com to the Let's Encrypt staging service has revealed issues that may prevent any certificate for this domain being issued.
24.144.23.95: Fetching http://cv-meet.kozow.com/.well-known/acme-challenge/As2CuDY46c4iIJDzvbOSyQ1GSWMXzTaY6zj9bdzM5oA: Timeout during connect (likely firewall problem)