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