Certbot failed to authenticate some domains (authenticator: nginx). The Certific ate Authority reported these problems:
Detail: : Fetching http://example.com/.well-known/acme-challen ge/jV2_e26mL2o8BO8lsapYI1JOpoPa8QvKcphVKaPjK_s: Connection refused
Hint: The Certificate Authority failed to verify the temporary nginx configurati on changes made by Certbot. Ensure the listed domains point to this nginx server and that it is accessible from the internet.
Some challenges have failed.
Ask for help or search for solutions at https://community.letsencrypt.org. See t he logfile /var/log/letsencrypt/letsencrypt.log or re-run Certbot with -v for mo re details.
How can i resolve it?