Fatal error: Uncaught Error: Class "Office365\Outlook\OutlookItem" not found in C:\xampp\htdocs\vendor\vgrem\php-spo\src\Outlook\Messages\Message.php:23 Stack trace: #0 {main} thrown in C:\xampp\htdocs\vendor\vgrem\php-spo\src\Outlook\Messages\Message.php on line 23