darktower02.asuscomm.com has an A (IPv4) record (217.180.207.160) 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://darktower02.asuscomm.com/.well-known/acme-challenge/letsdebug-test": dial tcp 217.180.207.160:80: connect: connection refused
Trace:
@0ms: Making a request to http://darktower02.asuscomm.com/.well-known/acme-challenge/letsdebug-test (using initial IP 217.180.207.160)
@0ms: Dialing 217.180.207.160
@34ms: Experienced error: dial tcp 217.180.207.160:80: connect: connection refused
A test authorization for darktower02.asuscomm.com to the Let's Encrypt staging service has revealed issues that may prevent any certificate for this domain being issued.
Fetching http://darktower02.asuscomm.com/.well-known/acme-challenge/7RK6J3oM-9WJz6D1sVY72OUjZX5VgG1l1RGio2bUrwE: Connection refused