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.
A timeout was experienced while communicating with darktower02.asuscomm.com/217.180.207.160: Get "http://darktower02.asuscomm.com/.well-known/acme-challenge/letsdebug-test": context deadline exceeded
Trace:
@0ms: Making a request to http://darktower02.asuscomm.com/.well-known/acme-challenge/letsdebug-test (using initial IP 217.180.207.160)
@2ms: Dialing 217.180.207.160
@10000ms: Experienced error: context deadline exceeded
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/EBk0ykjyQaN1D82U1lICB0-MPksTRVIViQPlNSt_p-Y: Timeout during connect (likely firewall problem)
darktower02.asuscomm.com is currently affected by Let's Encrypt-based rate limits (https://letsencrypt.org/docs/rate-limits/). You may review certificates that have already been issued by visiting https://crt.sh/?q=%asuscomm.com . Please note that it is not possible to ask for a rate limit to be manually cleared.
The 'Certificates per Registered Domain' limit (50 certificates per week that share the same Registered Domain: asuscomm.com) has been exceeded. There is no way to work around this rate limit. The next non-renewal certificate for this Registered Domain should be issuable after 2021-10-01 15:29:14 +0000 UTC (9m0s from now).