The /.well-known/acme-challenge/ URL path is not reachable for the domain.com domain. This can be either due to a DNS problem, or because you have an .htaccess file that rewrites the URL path to an unexpected location. In case of a rewrite rule, be sure to exclude the /.well-known/acme-challenge/ URL path by adding a rewrite condition such as RewriteCond %{REQUEST_URI} !^/.well-known/acme-challenge/
ping to this domain me shows the public ip no the internal ip