gitlab.fkti.etu.ru has an A (IPv4) record (194.85.169.149) but a request to this address over port 80 did not succeed. Your web server must have at least one working IPv4 or IPv6 address.
Get "http://gitlab.fkti.etu.ru/.well-known/acme-challenge/letsdebug-test": dial tcp 194.85.169.149:80: connect: connection refused
Trace:
@0ms: Making a request to http://gitlab.fkti.etu.ru/.well-known/acme-challenge/letsdebug-test (using initial IP 194.85.169.149)
@0ms: Dialing 194.85.169.149
@1125ms: Experienced error: dial tcp 194.85.169.149:80: connect: connection refused
A test authorization for gitlab.fkti.etu.ru to the Let's Encrypt staging service has revealed issues that may prevent any certificate for this domain being issued.
194.85.169.149: Fetching http://gitlab.fkti.etu.ru/.well-known/acme-challenge/9n3JkR65m8mhqkCoTWsTE_U9rRgu1Mi9L8EGCMD1LAM: Connection refused