Let's Debug

Test result for mamadisio.gr using http-01

mamadisio.gr has an AAAA (IPv6) record (2a01:7e01::f03c:92ff:fedc:e5ed) 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://mamadisio.gr/.well-known/acme-challenge/letsdebug-test": dial tcp [2a01:7e01::f03c:92ff:fedc:e5ed]:80: connect: connection refused

Trace:
@0ms: Making a request to http://mamadisio.gr/.well-known/acme-challenge/letsdebug-test (using initial IP 2a01:7e01::f03c:92ff:fedc:e5ed)
@0ms: Dialing 2a01:7e01::f03c:92ff:fedc:e5ed
@79ms: Experienced error: dial tcp [2a01:7e01::f03c:92ff:fedc:e5ed]:80: connect: connection refused
Debug
Requests made to the domain
Request to: mamadisio.gr/2a01:7e01::f03c:92ff:fedc:e5ed, Result: [Address=2a01:7e01::f03c:92ff:fedc:e5ed,Address Type=IPv6,Server=,HTTP Status=0], Issue: AAAANotWorking
Trace:
@0ms: Making a request to http://mamadisio.gr/.well-known/acme-challenge/letsdebug-test (using initial IP 2a01:7e01::f03c:92ff:fedc:e5ed)
@0ms: Dialing 2a01:7e01::f03c:92ff:fedc:e5ed
@79ms: Experienced error: dial tcp [2a01:7e01::f03c:92ff:fedc:e5ed]:80: connect: connection refused

Request to: mamadisio.gr/172.104.205.240, Result: [Address=172.104.205.240,Address Type=IPv4,Server=nginx/1.18.0 (Ubuntu),HTTP Status=404], Issue:
Trace:
@0ms: Making a request to http://mamadisio.gr/.well-known/acme-challenge/letsdebug-test (using initial IP 172.104.205.240)
@0ms: Dialing 172.104.205.240
@158ms: Server response: HTTP 404 Not Found

Debug
A and AAAA records found for this domain
mamadisio.gr. 0 IN A 172.104.205.240
mamadisio.gr. 0 IN AAAA 2a01:7e01::f03c:92ff:fedc:e5ed
Challenge update failures for mamadisio.gr in order https://acme-staging-v02.api.letsencrypt.org/acme/order/5751349/189751070
acme: error code 403 "urn:ietf:params:acme:error:unauthorized": Invalid response from http://mamadisio.gr/.well-known/acme-challenge/57mD5PIp3rjtteyismZNMoXY72WuvmWEDTAFQRR4SqQ [172.104.205.240]: "<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/1.18.0 (Ub"
Debug
The IANA public suffix is the TLD of the Registered Domain
The TLD for mamadisio.gr is: gr
Debug
The current status.io status for Let's Encrypt
Operational

Submitted Nov 22 23:27:07 2020. Sat in queue for 2ms. Completed in 8s. Hide verbose information.