Symfony 4 - How to fix '404 Not Found' for a web api REST where routes does exists?

I'm trying to implement a REST API with symfony 4. My problem is that I can't reach my routes for my method GET and POST. Everytime I try, I get a 404 error.

But when I try to get my routes on symfony, I have :

Name                            Method   Scheme   Host   Path

app_statistics_poststatistics   POST     ANY      ANY    /api/stat
app_statistics_getstatistics    GET      ANY      ANY    /api/stat/{statId}

So my routes does exist, but I can't reach them.

I'm working on a Windows Environment with WAMP to work in local.

I've already tried my api on 2 windows environnment and on one Linux environnment with LAMP. Always getting a 404 Not Found.

The author of the tutorial told me that my api was working on his computer, but I don't have more info about his environnment. So, I expect the problem to come from the configuration of my virtual host.

Here is my virtual host:

<VirtualHost *:80>
    ServerName statroche.fr
    ServerAlias www.statroche.fr
    DocumentRoot "D:/other/symfony/testRoche/public"
    <Directory "D:/other/symfony/testRoche/public">
        Options +Indexes +Includes +FollowSymLinks +MultiViews
        AllowOverride All
        Require local
    </Directory>
</VirtualHost>

Important note: I don't have anything in my public folder as I don't want any page, just the API, do I still need to put 'public' in DocumentRoot and Directory ?.

I would like to reach my API and then for the GET method for example, return a json. Actually, I can reach the / of my project but can't reach other routes.

Even if you don't want to build an "old-style website" with Symfony, you have to use index.php to bootstrap Symfony and to make the API accessible