The "free SSL" meant adding your domain as a sub of theirs, i.e. https://yourdomain.namecheap.com. I fell for it and was pretty salty to see how much they charge and the lack of a letsencrypt integration.

And on that note, Letsencrypt has a helpful list of hosting companies that automate the process for you: https://community.letsencrypt.org/t/web-hosting-who-support-...