Fatal error: Uncaught Error: Class "League\Config\Exception\InvalidConfigurationException" not found in D:\NTG_App\www\My_Personal\PCM\vendor\league\config\src\Exception\ValidationException.php:18 Stack trace: #0 {main} thrown in D:\NTG_App\www\My_Personal\PCM\vendor\league\config\src\Exception\ValidationException.php on line 18