Fatal error: Uncaught Error: Class "Microsoft\Graph\Generated\Models\IdentitySet" not found in C:\xampp\htdocs\londoncityroom\vendor\microsoft\microsoft-graph\src\Generated\Models\ChatMessageFromIdentitySet.php:9 Stack trace: #0 {main} thrown in C:\xampp\htdocs\londoncityroom\vendor\microsoft\microsoft-graph\src\Generated\Models\ChatMessageFromIdentitySet.php on line 9