Why does laravel say the class doesn't exist if it exists?

Question

Laravel

Hello, I am new to laravel, I just sat down to master this framework and immediately got an annoying error. Says that the TestController controller does not exist, although it certainly does.

web.php: App/Http/Controllers/TestController.php:
Route::get('test/show', '[email protected]');

namespace App\Http\Controllers;
  use App\Http\Controllers\Controller;
  
  class TestController extends Controller
  {
    public function show()
    {
      return 'TestController';
    }
  }

What could be wrong here?

Answer 1

Above correctly wrote composer dump-autoloaddo it.
In order not to do this manually every time - create controllers and so on through artisan, then everything will be created
for the controller php artisan make:controller TestControllerand connected to autoload by itself.
php artisan help makelook what he can create

Answer 2

1. Try clearing cachephp artisan optimize:clear
   
2. Check file/directory permissions