File not found on my online server

I did as explained in this guide (first (and best) solution), I have a folder at the root of my server under the name www, which contains all the project files. And I've changed the root folder in the server settings so that it points directly to the public folder. I can try the other solutions suggested, but I don't understand why the first solution doesn't work.

---

I've just tried the other two solutions (with two directories, and using .htaccess) and the site still works, but the epas37.com/test route still doesn't work.