howtostudyonline.com has an AAAA (IPv6) record (2a00:da00:1800:16::1) but a test request to this address over port 80 did not succeed. Your web server must have at least one working IPv4 or IPv6 address. You should either ensure that validation requests to this domain succeed over IPv6, or remove its AAAA record.
A timeout was experienced while communicating with howtostudyonline.com/2a00:da00:1800:16::1: Get "http://howtostudyonline.com/.well-known/acme-challenge/letsdebug-test": dial tcp [2a00:da00:1800:16::1]:80: i/o timeout
Trace:
@0ms: Making a request to http://howtostudyonline.com/.well-known/acme-challenge/letsdebug-test (using initial IP 2a00:da00:1800:16::1)
@2ms: Dialing 2a00:da00:1800:16::1
@10000ms: Experienced error: dial tcp [2a00:da00:1800:16::1]:80: i/o timeout
A test authorization for howtostudyonline.com to the Let's Encrypt staging service has revealed issues that may prevent any certificate for this domain being issued.
Fetching https://howtostudyonline.com/.well-known/acme-challenge/aVtJocjypr9Ex5nC62mRzbGR_-Ke7bBphPz2kd-8fUM: Timeout during connect (likely firewall problem)
Requests made to the domain
Request to: howtostudyonline.com/2a00:da00:1800:16::1, Result: [Address=2a00:da00:1800:16::1,Address Type=IPv6,Server=,HTTP Status=0], Issue: AAAANotWorking
Trace:
@0ms: Making a request to http://howtostudyonline.com/.well-known/acme-challenge/letsdebug-test (using initial IP 2a00:da00:1800:16::1)
@2ms: Dialing 2a00:da00:1800:16::1
@10000ms: Experienced error: dial tcp [2a00:da00:1800:16::1]:80: i/o timeout
Request to: howtostudyonline.com/185.132.36.92, Result: [Address=185.132.36.92,Address Type=IPv4,Server=nginx,HTTP Status=301,Number of Redirects=1,Final HTTP Status=404], Issue:
Trace:
@0ms: Making a request to http://howtostudyonline.com/.well-known/acme-challenge/letsdebug-test (using initial IP 185.132.36.92)
@0ms: Dialing 185.132.36.92
@151ms: Server response: HTTP 301 Moved Permanently
@152ms: Received redirect to https://howtostudyonline.com/.well-known/acme-challenge/letsdebug-test
@152ms: Dialing 185.132.36.92
@404ms: Server response: HTTP 404 Not Found
A and AAAA records found for this domain
howtostudyonline.com. 0 IN A 185.132.36.92
howtostudyonline.com. 0 IN AAAA 2a00:da00:1800:16::1
Challenge update failures for howtostudyonline.com in order https://acme-staging-v02.api.letsencrypt.org/acme/order/5751349/71509563
acme: error code 400 "urn:ietf:params:acme:error:connection": Fetching https://howtostudyonline.com/.well-known/acme-challenge/aVtJocjypr9Ex5nC62mRzbGR_-Ke7bBphPz2kd-8fUM: Timeout during connect (likely firewall problem)
The IANA public suffix is the TLD of the Registered Domain
The TLD for howtostudyonline.com is: com
The current status.io status for Let's Encrypt
Operational