AccessDeniedHandler.php

<?php
namespace App\Security;

use Symfony\Component\HttpFoundation\Request;
use Symfony\Component\HttpFoundation\Response;
use Symfony\Component\Security\Core\Exception\AccessDeniedException;
use Symfony\Component\Security\Http\Authorization\AccessDeniedHandlerInterface;

class AccessDeniedHandler implements AccessDeniedHandlerInterface
{
    public function __construct(\Twig_Environment $twig)
    {
        $this->twig = $twig;
    }

    public function handle(Request $request, AccessDeniedException $accessDeniedException)
    {
        //@TODO : beautiful error
        // return new Response($this->twig->render('@Twig/Exception/error.html.twig'), 403);
        return new Response('', 403);
    }
}