Fatal error: Uncaught Error: Class "Google\Protobuf\Internal\Message" not found in C:\xampp\htdocs\API\vendor\google\cloud\Retail\src\V2\SetInventoryRequest.php:18 Stack trace: #0 {main} thrown in C:\xampp\htdocs\API\vendor\google\cloud\Retail\src\V2\SetInventoryRequest.php on line 18