Fatal error: Uncaught Error: Class "SellingPartnerApi\Response" not found in D:\www\vendor\jlevers\selling-partner-api\src\Seller\MessagingV1\Responses\CreateConfirmCustomizationDetailsResponse.php:16 Stack trace: #0 {main} thrown in D:\www\vendor\jlevers\selling-partner-api\src\Seller\MessagingV1\Responses\CreateConfirmCustomizationDetailsResponse.php on line 16