After nginx & certbot configuration I can't access strapi through https://domain.com:1337 but i can through http://[DigitalOcean IP]:1337

He directly said in the first post that if he hits the :1337 he gets a response but that it’s an SSL error. What is missing here is a firewall rule to block port 1337 inbound or to change Strapi’s host setting to localhost or 127.0.0.1