Let's Debug

Test result for 12a.sh using http-01

Error
12a.sh has an A (IPv4) record (146.115.132.10) 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 12a.sh/146.115.132.10: Get "http://12a.sh/.well-known/acme-challenge/letsdebug-test": context deadline exceeded

Trace:
@0ms: Making a request to http://12a.sh/.well-known/acme-challenge/letsdebug-test (using initial IP 146.115.132.10)
@0ms: Dialing 146.115.132.10
@10000ms: Experienced error: context deadline exceeded
A test authorization for 12a.sh to the Let's Encrypt staging service has revealed issues that may prevent any certificate for this domain being issued.
Fetching http://12a.sh/.well-known/acme-challenge/Sr_IbRxsA_RMZk2g9HoPaSUOea0Mk-o5dLe7dpG13CU: Timeout during connect (likely firewall problem)
Debug
Requests made to the domain
Request to: 12a.sh/146.115.132.10, Result: [Address=146.115.132.10,Address Type=IPv4,Server=,HTTP Status=0], Issue: ANotWorking
Trace:
@0ms: Making a request to http://12a.sh/.well-known/acme-challenge/letsdebug-test (using initial IP 146.115.132.10)
@0ms: Dialing 146.115.132.10
@10000ms: Experienced error: context deadline exceeded

Debug
A and AAAA records found for this domain
12a.sh. 0 IN A 146.115.132.10
Challenge update failures for 12a.sh in order https://acme-staging-v02.api.letsencrypt.org/acme/order/5751349/221381528
acme: error code 400 "urn:ietf:params:acme:error:connection": Fetching http://12a.sh/.well-known/acme-challenge/Sr_IbRxsA_RMZk2g9HoPaSUOea0Mk-o5dLe7dpG13CU: Timeout during connect (likely firewall problem)
Debug
The IANA public suffix is the TLD of the Registered Domain
The TLD for 12a.sh is: sh
Debug
The current status.io status for Let's Encrypt
Operational

Submitted Jan 15 03:16:09 2021. Sat in queue for 2ms. Completed in 15s. Hide verbose information.