Let's Debug

Test result for cg-sr-exch.cg.ru using http-01

NoRecords
Fatal
No valid A or AAAA records could be ultimately resolved for cg-sr-exch.cg.ru. This means that Let's Encrypt would not be able to to connect to your domain to perform HTTP validation, since it would not know where to connect to.
No A or AAAA records found.
InternalProblem
Debug
An internal error occurred while checking the domain
Failed to query certwatch database to check rate limits: dial tcp: i/o timeout
PublicSuffix
Debug
The IANA public suffix is the TLD of the Registered Domain
The TLD for cg-sr-exch.cg.ru is: ru
StatusIO
Debug
The current status.io status for Let's Encrypt
Operational

Submitted Jul 20 18:41:25 2020. Sat in queue for 2ms. Completed in 7s. Hide verbose information.