barryvdh/laravel-dompdf doesn't work last version for now

My code doesn't work. I use Laravel framework. Error on the picture. I think maybe it's looping

config/app:

'providers' => [
Barryvdh\DomPDF\ServiceProvider::class,
 ],
 'aliases' => [
 'PDF' => Barryvdh\DomPDF\Facade::class,
 ],

web.php //routes:

Route::get('/', function () { //Авторизация
  return view('auth.authorize');
})->name('/');
Route::namespace('App\Http\Controllers')->group(function () { 
  Route::post('/auth', 'AuthController@auth');  
  Route::middleware('auth')->group(function () {  
    Route::get('/layouts', function () { 
      return view('layouts.app');
    });
    Route::get('/logout', 'AuthController@logout'); 
    Route::get('/deals/preview/{id}', 'DealsController@preview')->name('deals.preview'); //this
    Route::get('/deals/generate/{id}', 'DealsController@generatePDF')->name('deals.generate'); //this

My controller:

use PDF;
class DealsController extends Controller
{...
public function generatePDF($id)
    {
        $application_form = Application_form::find($id);
        $pdf = PDF::loadView('deals.show', ['application_form'=>$application_form]);
       return $pdf->download('demo.pdf');       
    }...
}

my blade show.blade.php:

 <a href="{{ route('deals.generate', ['id' => $application_form->id]) }}" class="btn btn-primary">Generation to pdf
          <i class="fa fa-pencil-square"></i>
        </a> 

It's my error. Laravel doesn't generate my PHP-HTML page.