Fatal error: Uncaught Error: Class 'Illuminate\Database\Connection' not found in D:\xampp\htdocs\psp\backend\vendor\laravel\framework\src\Illuminate\Database\MySqlConnection.php:16 Stack trace: #0 {main} thrown in D:\xampp\htdocs\psp\backend\vendor\laravel\framework\src\Illuminate\Database\MySqlConnection.php on line 16