Fatal error: Uncaught Error: Interface 'Illuminate\Contracts\Events\Dispatcher' not found in D:\xampp\htdocs\psp\backend\vendor\laravel\framework\src\Illuminate\Events\Dispatcher.php:20 Stack trace: #0 {main} thrown in D:\xampp\htdocs\psp\backend\vendor\laravel\framework\src\Illuminate\Events\Dispatcher.php on line 20