Let's Debug

Test result for countomega.ddnsfree.com using http-01

countomega.ddnsfree.com has an AAAA (IPv6) record (2003:ea:dbd6:ea00:646c:ebff:fe45:ddbb) 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://countomega.ddnsfree.com/.well-known/acme-challenge/letsdebug-test: dial tcp [2003:ea:dbd6:ea00:646c:ebff:fe45:ddbb]:80: connect: permission denied

Trace:
@0ms: Making a request to http://countomega.ddnsfree.com/.well-known/acme-challenge/letsdebug-test (using initial IP 2003:ea:dbd6:ea00:646c:ebff:fe45:ddbb)
@0ms: Dialing 2003:ea:dbd6:ea00:646c:ebff:fe45:ddbb
@114ms: Experienced error: dial tcp [2003:ea:dbd6:ea00:646c:ebff:fe45:ddbb]:80: connect: permission denied
Debug
Requests made to the domain
Request to: countomega.ddnsfree.com/2003:ea:dbd6:ea00:646c:ebff:fe45:ddbb, Result: [Address Type=IPv6,Server=,HTTP Status=0], Issue: AAAANotWorking
Trace:
@0ms: Making a request to http://countomega.ddnsfree.com/.well-known/acme-challenge/letsdebug-test (using initial IP 2003:ea:dbd6:ea00:646c:ebff:fe45:ddbb)
@0ms: Dialing 2003:ea:dbd6:ea00:646c:ebff:fe45:ddbb
@114ms: Experienced error: dial tcp [2003:ea:dbd6:ea00:646c:ebff:fe45:ddbb]:80: connect: permission denied

Request to: countomega.ddnsfree.com/93.212.153.143, Result: [Address Type=IPv4,Server=Apache/2.4.25 (Raspbian),HTTP Status=404], Issue:
Trace:
@0ms: Making a request to http://countomega.ddnsfree.com/.well-known/acme-challenge/letsdebug-test (using initial IP 93.212.153.143)
@0ms: Dialing 93.212.153.143
@236ms: Server response: HTTP 404 Not Found

Debug
A and AAAA records found for this domain
countomega.ddnsfree.com. 0 IN A 93.212.153.143
countomega.ddnsfree.com. 0 IN AAAA 2003:ea:dbd6:ea00:646c:ebff:fe45:ddbb
Challenge update failures for countomega.ddnsfree.com in order https://acme-staging-v02.api.letsencrypt.org/acme/order/5751349/34721352
acme: error code 403 "urn:ietf:params:acme:error:unauthorized": Invalid response from http://countomega.ddnsfree.com/.well-known/acme-challenge/KsolPW2OFEVsMtP7XODk9--jfKSfS0PKccoX2LDSsAk [93.212.153.143]: "<!DOCTYPE HTML PUBLIC \"-//IETF//DTD HTML 2.0//EN\">\n<html><head>\n<title>404 Not Found</title>\n</head><body>\n<h1>Not Found</h1>\n<p"
Debug
The IANA public suffix is the TLD of the Registered Domain
The TLD for countomega.ddnsfree.com is: com
Debug
The current status.io status for Let's Encrypt
Operational

Submitted May 21 14:33:03 2019. Sat in queue for 2ms. Completed in 12s. Hide verbose information.