[solved] Strugardragos.com

[dragify]

My domain is: strugardragos.com

I ran this command: sudo certbot --nginx

It produced this output:

Saving debug log to /var/log/letsencrypt/letsencrypt.log

Plugins selected: Authenticator nginx, Installer nginx

Which names would you like to activate HTTPS for?

1: strugardragos.com
2: www.strugardragos.com

Select the appropriate numbers separated by commas and/or spaces, or leave input
blank to select all options shown (Enter ‘c’ to cancel):
Obtaining a new certificate
Performing the following challenges:
tls-sni-01 challenge for strugardragos.com
tls-sni-01 challenge for www.strugardragos.com
Waiting for verification…
Cleaning up challenges
Failed authorization procedure. strugardragos.com (tls-sni-01): urn:acme:error:unknownHost :: The server could not resolve a domain name :: No valid IP addresses found for strugardragos.com, www.strugardragos.com (tls-sni-01): urn:acme:error:unknownHost :: The server could not resolve a domain name :: No valid IP addresses found for www.strugardragos.com

IMPORTANT NOTES:

• The following errors were reported by the server:

  Domain: strugardragos.com
  Type: unknownHost
  Detail: No valid IP addresses found for strugardragos.com

  Domain: www.strugardragos.com
  Type: unknownHost
  Detail: No valid IP addresses found for www.strugardragos.com

  To fix these errors, please make sure that your domain name was
  entered correctly and the DNS A/AAAA record(s) for that domain
  contain(s) the right IP address.

My web server is (include version): nginx version: nginx/1.10.3

The operating system my web server runs on is (include version): Ubuntu 16.06

My hosting provider, if applicable, is: Digital Ocean

I can login to a root shell on my machine (yes or no, or I don’t know): yes

I’m using a control panel to manage my site (no, or provide the name and version of the control panel): no, just a command line

[bytecamp]

Check your DNS settngs, there is no A record for strugardragos.com.

[dragify]

Thank you. What a stupid mistake.