Fatal error: Uncaught Error: Class "Office365\SharePoint\Principal" not found in C:\xampp\htdocs\Tico\vendor\vgrem\php-spo\src\SharePoint\Group.php:16 Stack trace: #0 {main} thrown in C:\xampp\htdocs\Tico\vendor\vgrem\php-spo\src\SharePoint\Group.php on line 16