Fatal error: Uncaught Error: Class "Office365\Runtime\ClientRuntimeContext" not found in C:\xampp\htdocs\vendor\vgrem\php-spo\src\SharePoint\ClientContext.php:24 Stack trace: #0 {main} thrown in C:\xampp\htdocs\vendor\vgrem\php-spo\src\SharePoint\ClientContext.php on line 24