With Full Requesting a certificate for office.sadlips.com Certbot failed to authenticate some domains (authenticator: nginx). The Certificate Authority reported these problems: Domain: office.sadlips.com Type: unauthorized Detail: 2606:4700:3033::ac43:b4c7: Invalid response from https://office.sadlips.com/.well-known/acme-challenge/jedPrMtlXyi24tgN5wMta18bw6w4eRMYSfJCxnhQ7Jc: 525 Hint: The Certificate Authority failed to verify the temporary nginx configuration 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 the logfile /var/log/letsencrypt/letsencrypt.log or re-run Certbot with -v for more details. With Full Strict Saving debug log to /var/log/letsencrypt/letsencrypt.log Plugins selected: Authenticator nginx, Installer nginx Requesting a certificate for office.sadlips.com Performing the following challenges: http-01 challenge for office.sadlips.com Waiting for verification... Challenge failed for domain office.sadlips.com http-01 challenge for office.sadlips.com Certbot failed to authenticate some domains (authenticator: nginx). The Certificate Authority reported these problems: Domain: office.sadlips.com Type: unauthorized Detail: 2606:4700:3033::6815:1246: Invalid response from https://office.sadlips.com/.well-known/acme-challenge/NMI-EQ2rirGGOl_pVG2RdiKS8nzKe8pYuzTjywxkUQA: 404 Hint: The Certificate Authority failed to verify the temporary nginx configuration changes made by Certbot. Ensure the listed domains point to this nginx server and that it is accessible from the internet. Cleaning up challenges Some challenges have failed. Ask for help or search for solutions at https://community.letsencrypt.org. See the logfile /var/log/letsencrypt/letsencrypt.log or re-run Certbot with -v for more details.