Have you made sure your index.html file doesn’t have a capital?
I know it sounds crazy, but the server is case sensitive.
The other thing to check is in your dashboard, in the domain, you’ll see a box that looks something like this:
Make sure you’re working in the right htdocs folder. I know I’ve made that mistake before
This post from admin might help further:
Also make sure you’re not using the www. sub sub domain if youre using https/.
