That's correct. Certbot can use different plugins for validating the name and for installing the certificate. You can configure HTTP-01 to work and use "certb

That's correct. Certbot can use different plugins for validating the name and for installing the certificate. You can configure HTTP-01 to work and use "certbot -a webroot -i nginx -w /path/to/whatever -d example.com -d www.example.com". https://community.letsencrypt.org/t/solution-client-with-the-currently-selected-authenticator-does-not-support-any-combination-of-challenges-that-will-satisfy-the-ca/49983 https://community.letsencrypt.org/t/solution-client-with-the...