laravel - .htaccess refuse open index.php

I have a .htaccess file like this :

DirectoryIndex index.php

<IfModule mod_rewrite.c>
    <IfModule mod_negotiation.c>
        Options -MultiViews -Indexes
    </IfModule>

    RewriteEngine On

    # Handle Authorization Header
    RewriteCond %{HTTP:Authorization} .
    RewriteRule .* - [E=HTTP_AUTHORIZATION:%{HTTP:Authorization}]

    # Redirect Trailing Slashes If Not A Folder...
    RewriteCond %{REQUEST_FILENAME} !-d
    RewriteCond %{REQUEST_URI} (.+)/$
    RewriteRule ^ %1 [L,R=301]

    # Send Requests To Front Controller...
    RewriteCond %{REQUEST_FILENAME} !-d
    RewriteCond %{REQUEST_FILENAME} !-f
    RewriteRule ^ index.php [L]
</IfModule>

and route like this:

Route::get('/', function () {
    return view('index',[
        'bg' => 'bg-nayapink',
        'active' =>'Home'
    ]);
});

Route::get('/services', function () {
    return view('services', [
        'active' => 'Services',
        'bg' => 'bg-nayayellow'
    ]);
}); 

The problem is that whenever I tried to access "mysite.com" (mean: '/' route) it always opened index.html instead of index.php. Other routes are open normally, except the empty one. The website is already hosted on a shared server.

Solution:

I fixed it. It is because of the cache. Before this site, there was a site too already and has been deleted then overwritten with this one. So, I just need to clear all cache.