отсутствует определенный маршрут — Missing Route в Cakephp 3.4

Я пытаюсь использовать префикс «студент». Когда я создаю ссылку в шаблоне или файле макета, я получаю эту ошибку, как показано на рисунке:

код в rout.php

    <?php
use Cake\Core\Plugin;
use Cake\Routing\RouteBuilder;
use Cake\Routing\Router;
use Cake\Routing\Route\DashedRoute;

Router::defaultRouteClass(DashedRoute::class);

Router::scope('/', function (RouteBuilder $routes) {
$routes->connect('/', ['controller' => 'Pages', 'action' => 'display', 'home']);
$routes->connect('/pages/*', ['controller' => 'Pages', 'action' => 'display']);
$routes->fallbacks(DashedRoute::class);
});Router::prefix('admin', function ($routes) {
$routes->connect('/users/', [ 'controller' => 'MyUsers', 'action' => 'index', 'plugin'=>false]);
$routes->connect('/login', [ 'controller' => 'MyUsers', 'action' => 'login', 'plugin'=>false, 'prefix'=>'admin']);
$routes->connect('/', [ 'controller' => 'MyUsers', 'action' => 'dashboard', 'plugin'=>false]);
$routes->fallbacks(DashedRoute::class);
});

Router::prefix('trainer', function ($routes) {
$routes->connect('/users/', [ 'controller' => 'MyUsers', 'action' => 'index', 'plugin'=>false]);
$routes->connect('/login', [ 'controller' => 'MyUsers', 'action' => 'login', 'plugin'=>false]);
$routes->connect('/', [ 'controller' => 'MyUsers', 'action' => 'dashboard', 'plugin'=>false]);
$routes->fallbacks(DashedRoute::class);
});Router::prefix('student', function ($routes) {
$routes->connect('/courses/', array ( 'controller' => 'Courses', 'action' => 'index', 'plugin' => false, 'prefix' => 'student', '_ext' => NULL, ));
$routes->connect('/', array ( 'controller' => 'MyUsers', 'action' => 'dashboard', 'plugin' => false));
});

/**
* Load all plugin routes.  See the Plugin documentation on
* how to customize the loading of plugin routes.
*/
Plugin::routes();

файл макета student.ctp имеет только одну строку кода:

<li><?php echo $this->Html->link('Courses', [ 'controller' => 'Courses', 'action' => 'index', 'plugin' => false, 'prefix' => 'student', '_ext' => NULL, ]);?></li>

AppController.php:

    <?php

namespace App\Controller;

use Cake\Controller\Controller;
use Cake\Event\Event;
use  Cake\Core\Configure;
use Cake\Network\Exception\NotFoundException;class AppController extends Controller
{

public $helpers = array(
'CakeDC/Users.AuthLink',
'CakeDC/Users.User',
);public function initialize()
{
parent::initialize();

$this->loadComponent('RequestHandler');
$this->loadComponent('Flash');
$this->loadComponent('CakeDC/Users.UsersAuth');
$this->loadComponent('Utils.GlobalAuth');

$this->Auth->config('loginRedirect', array('controller'=>'Courses', 'action'=>'index', 'plugin'=>FALSE));
$this->Auth->config('logoutRedirect', array('controller'=>'MyUsers', 'action'=>'login', 'plugin'=>FALSE));
$this->Auth->config('unauthorizedRedirect', array('controller'=>'Courses', 'action'=>'index', 'prefix'=>$this->Auth->user('role')));
$this->Auth->config('loginAction', array('controller'=>'MyUsers', 'action'=>'login'));
$this->Auth->allow(['login', 'logout']);}public function beforeRender(Event $event)
{
if (!array_key_exists('_serialize', $this->viewVars) &&
in_array($this->response->type(), ['application/json', 'application/xml'])
) {
$this->set('_serialize', true);
}

$this->_renderLayout();
}

private function _renderLayout()
{
$prefix =  isset($this->request->params['prefix'])?$this->request->params['prefix']:FALSE;

if(!$prefix)
{
return;
}

$this->viewBuilder()->setLayout($prefix);}
}

Я проверил это решение: CakePHP 3: ошибка отсутствующего маршрута для существующего маршрута