Ошибка Fatal error: Call to a member function . on null in /./. on line

<?php
namespace Engine;
 
use Engine\Helper\Common;
use Engine\Core\Router\DispatchedRoute;
 
class Cms
{
    private $di;
 
    public $router;
 
    public function __construct($di)
    {
        $this->di = $di;
        $this->router = $this->di->get('router');
    }
 
    public function run()
    {
        $this->router->add('home', '/', 'HomeController:index');
        $this->router->add('user', '/user/12 ', 'UserController:index');
 
       // $routerDispatch = $this->router->dispatch((new Common()))
        $routerDispatch = $this->router->dispatch((new Common)->getMethod(), (new Common)->getPathUrl());
 
        list($class, $action) = explode(':', $routerDispatch->getController(), 2);
        print_r($class);
        echo '<br>';
        print_r($action);
 
//print_r($routerDispatch);
    }
}

<?php
 
 
namespace Engine\Core\Router;
 
 
class DispatchedRoute
{
    private $controller;
    private $parameters;
 
    public function __construct($controller, $parameters = [])
    {
        $this->controller = $controller;
        $this->parameters = $parameters;
    }
 
    /**
     * @return mixed
     */
    public function getController()
    {
        return $this->controller;
    }
 
    /**
     * @return array
     */
    public function getParameters()
    {
        return $this->parameters;
    }
 
}

$routerDispatch = $this->router->dispatch((new Common)->getMethod(), (new Common)->getPathUrl());