How to properly add a subdomain to DigitalOcean?

Question

Domain name market

Good afternoon, I use the DIgitalOcean + serverpilot web server. io. I add to an already existing domain in dgigitalocean A record with the name of the subdomain and cname record c www. the name of the subdomain, well, of course, I create a folder for the subdomain through serverpilot. I go through the browser to the site writes
Unable to access the site
Unable to find the DNS address of the sub.domain.ru server.
Search for sub domain ru in Google
ERR_NAME_NOT_RESOLVED
Help me solve the question, what could be the problem? what am i doing wrong?

Answer 1

https://serverpilot.io/support.html