Fatal error: Uncaught Error: Class "Aws\S3\S3Transfer\AbstractMultipartUploader" not found in /var/www/html/vendor/aws/aws-sdk-php/src/S3/S3Transfer/MultipartUploader.php:25 Stack trace: #0 {main} thrown in /var/www/html/vendor/aws/aws-sdk-php/src/S3/S3Transfer/MultipartUploader.php on line 25