无法在 Symfony 3 中找到模板

我知道有很多类似的主题，但我没有找到解决方案

我有这个问题

无法找到模板“CoreBundle：index.html.twig”（查看：/var/www/html/MyProject/vendor/symfony/symfony/src/Symfony/Bridge/Twig/Resources/views/Form）。

This is the architecture This is my controller

<?php

namespace CoreBundle\Controller;

use Symfony\Bundle\FrameworkBundle\Controller\Controller;
use Symfony\Component\HttpFoundation\Request;
use Sensio\Bundle\FrameworkExtraBundle\Configuration\Route;

class DefaultController extends Controller
{
    /**
     * @Route("/", name="index")
     */
    public function indexAction(Request $request)
    {
        return $this->render('CoreBundle:index.html.twig');
    }

    /**
     * @Route("/ma-personnalite", name="ma-personnalite")
     */
    public function mapersonnaliteAction(Request $request)
    {
        return $this->render('CoreBundle:ma_personnalite.html.twig');
    }

    /**
     * @Route("/cv", name="cv")
     */
    public function cvAction(Request $request)
    {
        return $this->render('CoreBundle:cv.html.twig');
    }

    /**
     * @Route("/scolaires", name="scolaires")
     */
    public function scolairesAction(Request $request)
    {
        return $this->render('CoreBundle:scolaires.html.twig');
    }

    /**
     * @Route("/extra-scolaires", name="extra-scolaires")
     */
    public function extrascolairesAction(Request $request)
    {
        return $this->render('CoreBundle:extra_scolaires.html.twig');
    }

    /**
     * @Route("/contact", name="contact")
     */
    public function contactAction(Request $request)
    {
        return $this->render('CoreBundle:contact.html.twig');
    }
}

这是config.yml

#app/config/routing.yml
core:
    resource: "@CoreBundle/Controller/"
    type:     annotation
    prefix:   /

谢谢你的时间

根据Symfony 3 文档 https://symfony.com/doc/3.4/templating.html#referencing-templates-in-a-bundle最好使用斜杠，不要使用“Bundle”一词。

所以，我们有这样的例子：

return $this->render('@BloggerBlog/Default/index.html.twig');