Fatal error: Uncaught Error: Class "Office365\Outlook\Recipient" not found in C:\xampp\htdocs\vendor\vgrem\php-spo\src\Outlook\Attendee.php:8 Stack trace: #0 {main} thrown in C:\xampp\htdocs\vendor\vgrem\php-spo\src\Outlook\Attendee.php on line 8