Fatal error: Uncaught Error: Class 'Aws\S3\Model\MultipartUpload\AbstractTransfer' not found in /home/latronic/clients/vendor/aws/aws-sdk-php/src/Aws/S3/Model/MultipartUpload/SerialTransfer.php:28 Stack trace: #0 {main} thrown in /home/latronic/clients/vendor/aws/aws-sdk-php/src/Aws/S3/Model/MultipartUpload/SerialTransfer.php on line 28