Fatal error: Uncaught Error: Class 'Aws\Multipart\AbstractUploadManager' not found in /home/edmedu/www/hana-edu.co.kr/sf4l/vendor/aws/aws-sdk-php/src/S3/MultipartCopy.php:10 Stack trace: #0 {main} thrown in /home/edmedu/www/hana-edu.co.kr/sf4l/vendor/aws/aws-sdk-php/src/S3/MultipartCopy.php on line 10