Laravel 5 redirect loop error

I trying to make a login and admin script, the problem is that i have a redirect loop i dont know why. I want the login users and can be in the "/" path not "/home". If change return new RedirectResponse(url('/')); to return new RedirectResponse(url('/anotherpage')); works but i want to be "/". I cant find the solution.

Routes:

    Route::get('/', [
        'as' => 'home', 'uses' => 'HomeController@index'
    ]);


    // Tutorials Routes

    Route::get('/tutorials', 'HomeController@tutorials');
    Route::get('/tutorials/{category?}', 'HomeController@tutorialsCategory');
    Route::get('/tutorials/{category?}/{lesson?}', 'HomeController@tutorialsLesson');

    // Courses and Series Routes

    Route::get('/courses-and-series', 'HomeController@coursesandseries');

    // Admin Routes

    Route::group(['middleware' => 'App\Http\Middleware\AdminMiddleware'],                 function()
    {
        Route::get('/admin', function()
        {
            return 'Is admin';
        });
    });

    Route::controllers([
        'auth' => 'Auth\AuthController',
        'password' => 'Auth\PasswordController',
    ]);

Admin middleware:

    public function handle($request, Closure $next)
    {
        if (Auth::user()->type != 'Admin')
        {
            return abort(404);
        }

        return $next($request);
    }

RedirectIfAuthenticated:

    public function handle($request, Closure $next)
    {
        if ($this->auth->check())
        {
            return new RedirectResponse(url('/'));
        }

        return $next($request);
    }

Thanks!