Sending an ACME HTTP validation request to serial-club.ru results in an unacceptable redirect. This is most likely a misconfiguration of your web server or your web application.
Bad port number provided when fetching https://serial-club.ru:/.well-known/acme-challenge/letsdebug-test:
Trace:
@0ms: Making a request to http://serial-club.ru/.well-known/acme-challenge/letsdebug-test (using initial IP 212.8.246.33)
@0ms: Dialing 212.8.246.33
@160ms: Server response: HTTP 301 Moved Permanently
@160ms: Received redirect to https://serial-club.ru:/.well-known/acme-challenge/letsdebug-test
Requests made to the domain
Request to: serial-club.ru/212.8.246.33, Result: [Address Type=IPv4,Server=nginx/1.12.2,HTTP Status=301,Number of Redirects=1,Final HTTP Status=301], Issue: BadRedirect
Trace:
@0ms: Making a request to http://serial-club.ru/.well-known/acme-challenge/letsdebug-test (using initial IP 212.8.246.33)
@0ms: Dialing 212.8.246.33
@160ms: Server response: HTTP 301 Moved Permanently
@160ms: Received redirect to https://serial-club.ru:/.well-known/acme-challenge/letsdebug-test
A and AAAA records found for this domain
serial-club.ru. 0 IN A 212.8.246.33
Challenge update failures for serial-club.ru in order https://acme-staging-v02.api.letsencrypt.org/acme/order/5751349/2410323
acme: error code 400 "urn:ietf:params:acme:error:connection": Fetching https://serial-club.ru:/.well-known/acme-challenge/H2GmquJ-HwUzIOgBdGxtJ5TzM4GsKCPHCSYA7l0DnAU: Error getting validation data
The IANA public suffix is the TLD of the Registered Domain
The TLD for serial-club.ru is: ru
The current status.io status for Let's Encrypt
Operational