Let's Debug

Test result for mail.cg.ru using http-01

Debug
Requests made to the domain
Request to: mail.cg.ru/217.198.1.91, Result: [Address=217.198.1.91,Address Type=IPv4,Server=Microsoft-IIS/8.5,HTTP Status=404], Issue:
Trace:
@0ms: Making a request to http://mail.cg.ru/.well-known/acme-challenge/letsdebug-test (using initial IP 217.198.1.91)
@0ms: Dialing 217.198.1.91
@332ms: Server response: HTTP 404 Not Found

Debug
A and AAAA records found for this domain
mail.cg.ru. 0 IN A 217.198.1.91
An internal error occurred while checking the domain
Failed to query certwatch database to check rate limits: dial tcp: i/o timeout
Challenge update failures for mail.cg.ru in order https://acme-staging-v02.api.letsencrypt.org/acme/order/5751349/117436756
acme: error code 403 "urn:ietf:params:acme:error:unauthorized": Invalid response from http://mail.cg.ru/.well-known/acme-challenge/hF_CvAjCsXdXDBhSsD8DBkgLq76pj2keBsyVWHmIbfU [217.198.1.91]: 404
Debug
The IANA public suffix is the TLD of the Registered Domain
The TLD for mail.cg.ru is: ru
Debug
The current status.io status for Let's Encrypt
Operational

Submitted Jul 20 18:47:21 2020. Sat in queue for 2ms. Completed in 7s. Hide verbose information.