Let's Debug

Test result for atw.name using http-01

atw.name has an AAAA (IPv6) record (2605:2700:0:3:a800:ff:fe85:7436) 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.
Get http://atw.name/.well-known/acme-challenge/letsdebug-test: dial tcp [2605:2700:0:3:a800:ff:fe85:7436]:80: connect: no route to host

Trace:
@0ms: Making a request to http://atw.name/.well-known/acme-challenge/letsdebug-test (using initial IP 2605:2700:0:3:a800:ff:fe85:7436)
@0ms: Dialing 2605:2700:0:3:a800:ff:fe85:7436
@3183ms: Experienced error: dial tcp [2605:2700:0:3:a800:ff:fe85:7436]:80: connect: no route to host
Debug
Requests made to the domain
Request to: atw.name/2605:2700:0:3:a800:ff:fe85:7436, Result: [Address=2605:2700:0:3:a800:ff:fe85:7436,Address Type=IPv6,Server=,HTTP Status=0], Issue: AAAANotWorking
Trace:
@0ms: Making a request to http://atw.name/.well-known/acme-challenge/letsdebug-test (using initial IP 2605:2700:0:3:a800:ff:fe85:7436)
@0ms: Dialing 2605:2700:0:3:a800:ff:fe85:7436
@3183ms: Experienced error: dial tcp [2605:2700:0:3:a800:ff:fe85:7436]:80: connect: no route to host

Request to: atw.name/71.19.154.117, Result: [Address=71.19.154.117,Address Type=IPv4,Server=nginx,HTTP Status=404], Issue:
Trace:
@0ms: Making a request to http://atw.name/.well-known/acme-challenge/letsdebug-test (using initial IP 71.19.154.117)
@0ms: Dialing 71.19.154.117
@130ms: Server response: HTTP 404 Not Found

Debug
A and AAAA records found for this domain
atw.name. 0 IN A 71.19.154.117
atw.name. 0 IN AAAA 2605:2700:0:3:a800:ff:fe85:7436
Challenge update failures for atw.name in order https://acme-staging-v02.api.letsencrypt.org/acme/order/5751349/62429214
acme: error code 403 "urn:ietf:params:acme:error:unauthorized": Invalid response from http://atw.name/.well-known/acme-challenge/mTIUCzIsY6XayMAWf27k_kq0Kj2CiU2n1ZQS5XnqhOc [71.19.154.117]: "<html>\r\n<head><title>404 Not Found</title></head>\r\n<body>\r\n<center><h1>404 Not Found</h1></center>\r\n<hr><center>nginx</center>\r\n"
Debug
The IANA public suffix is the TLD of the Registered Domain
The TLD for atw.name is: name
Debug
The current status.io status for Let's Encrypt
Operational

Submitted Nov 21 06:27:06 2019. Sat in queue for 1ms. Completed in 4s. Hide verbose information.