Failed authorization procedure. harbor02.ho.mpgps.co (http-01): urn:ietf:params:acme:error:dns :: No valid IP addresses found

Please fill out the fields below so we can help you better. Note: you must provide your domain name to get help. Domain names for issued certificates are all made public in Certificate Transparency logs (e.g. https://crt.sh/?q=example.com), so withholding your domain name here does not increase secrecy, but only makes it harder for us to provide help.

My domain is:harbor02.ho.mpgps.co

I ran this command:sudo certbot --nginx -d harbor02.ho.mpgps.co

It produced this output:Failed authorization procedure. harbor02.ho.mpgps.co (http-01): urn:ietf:params:acme:error:dns :: No valid IP addresses found for harbor02.ho.mpgps.co

My web server is (include version):nginx version: nginx/1.14.0 (Ubuntu)

The operating system my web server runs on is (include version): Ubuntu 18.04

My hosting provider, if applicable, is:

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):

The version of my client is (e.g. output of certbot --version or certbot-auto --version if you’re using Certbot):

The 10.0.0.0/8 is a private IP range, i.e.: not public. Therefore the Let’s Encrypt validation servers can’t connect to your server, which is required for validation. And no validation means no certificate.