4.13 Backend Route Doku mit Fehler

Hallo,
ich versuche einen neuen Navigationspunkt im Backend zu implementieren und folge der Doku:https://docs.contao.org/dev/guides/back-end-routes/
Ich habe die Dateien eins zu eins übernommen und erhalte folgenden Fehler:
The controller for URI "/contao/my-backend-route" is not callable: Controller "App\Controller\BackendController" cannot be fetched from the container because it is private. Did you forget to tag the service with "controller.service_arguments"?

Code:

---

<?php
// src/Controller/BackendController.php
namespace App\Controller;

use Symfony\Component\Routing\Annotation\Route;
use Symfony\Component\HttpFoundation\Response;
use Twig\Environment as TwigEnvironment;

/**
 * @Route("contao/my-backend-route",
 *    name=BackendController::class,
 *    defaults={"_scope": "backend"}
 * )
 */
class BackendController
{
    private $twig;
   
    public function __construct(TwigEnvironment $twig)
    {
        $this->twig = $twig;
    }

    public function __invoke(): Response
    {
        return new Response($this->twig->render(
            'my_backend_route.html.twig',
            []
        ));
    }
}

---

Code:

---

<?php
// src/EventListener/BackendMenuListener.php
namespace App\EventListener;

use App\Controller\BackendController;
use Contao\CoreBundle\Event\MenuEvent;
use Symfony\Component\HttpFoundation\RequestStack;
use Symfony\Component\Routing\RouterInterface;
use Terminal42\ServiceAnnotationBundle\Annotation\ServiceTag;

/**
 * @ServiceTag("kernel.event_listener", event="contao.backend_menu_build", priority=-255)
 */
class BackendMenuListener
{
    protected $router;
    protected $requestStack;

    public function __construct(RouterInterface $router, RequestStack $requestStack)
    {
        $this->router = $router;
        $this->requestStack = $requestStack;
    }

    public function __invoke(MenuEvent $event): void
    {
        $factory = $event->getFactory();
        $tree = $event->getTree();

        if ('mainMenu' !== $tree->getName()) {
            return;
        }

        $contentNode = $tree->getChild('content');

        $node = $factory
            ->createItem('my-module')
                ->setUri($this->router->generate(BackendController::class))
                ->setLabel('My Modules')
                ->setLinkAttribute('title', 'Title')
                ->setLinkAttribute('class', 'my-module')
                ->setCurrent($this->requestStack->getCurrentRequest()->get('_controller') === BackendController::class)
        ;

        $contentNode->addChild($node);
    }
}

---

Code:

---

# config/routes.yaml
app.controller:
    resource: ../src/Controller
    type: annotation

---

Poste deine services.yaml

Die habe ich gar nicht angelegt. Steht ja nichts in der Doku zu. Wie müsste die denn aussehen? Muss man die zwingend anlegen?

Für Controller schon, da, wie die Fehlermeldung schon sagt, der Controller als Service bspw. mit controller.service_arguments getagged werden muss (alternativ dazu auch einfach public: true).

ich habe jetzt mal diese service.ymal genommen:

Code:

---

# config/services.yaml
services:
    _defaults:
        autowire: true
        autoconfigure: true
        public: false

    App\:
        resource: ../src
        exclude: ../src/{Entity,Migrations,Model,Resources,Tests,Widget}
   
    App\Controller\:
        resource: ../src/Controller
        public: true

---

Die Fehlermeldung ist die gleiche

Jetzt hat es geklappt. Habe dazu noch ein Composer Update ausgeführt. Danke dir.