Let's Encrypt SSL for the subdomain

[ggsl]

Hello!
In the web I created domain.ex with SSL by Let's Encrypt.Then I added CNAME record to my DNS dev.domain.ex with creation dev.domain.ex in the web.

When I go to http://dev... it works, but I need SSL connection. When I try to create new SSL in VestaCP I receive "Error: No valid IP addresses found for dev.domain.ex"

Please, help me to make SSL connection for my subdomain. Thanks!

[hwcltjn]

Try changing it from a CNAME to an A record.

[ggsl]

Try changing it from a CNAME to an A record.

Hi! Thanks for the response!

No, it doesn't help.

I added SSL to my subdomain by removing aliases (www.dev.domain.ex)