Fatal error: Uncaught Error: Class "Aws\Multipart\AbstractUploadManager" not found in C:\Apache24\htdocs\ControlMantWeb\vendor\aws\aws-sdk-php\src\S3\MultipartCopy.php:10 Stack trace: #0 {main} thrown in C:\Apache24\htdocs\ControlMantWeb\vendor\aws\aws-sdk-php\src\S3\MultipartCopy.php on line 10