Fatal error: Uncaught Error: Class "Office365\Entity" not found in C:\xampp\htdocs\vendor\vgrem\php-spo\src\Outlook\Calendars\CalendarGroup.php:13 Stack trace: #0 {main} thrown in C:\xampp\htdocs\vendor\vgrem\php-spo\src\Outlook\Calendars\CalendarGroup.php on line 13