Fatal error: Uncaught Error: Class "Cloudinary\Api\UploadApiClient" not found in C:\xampp\htdocs\API\vendor\cloudinary\cloudinary_php\tests\Helpers\MockUploadApiClient.php:18 Stack trace: #0 {main} thrown in C:\xampp\htdocs\API\vendor\cloudinary\cloudinary_php\tests\Helpers\MockUploadApiClient.php on line 18