Fatal error: Uncaught Error: Class 'Aws\AwsClient' not found in /home/edmedu/www/hana-edu.co.kr/sf4l/vendor/aws/aws-sdk-php/src/ImportExport/ImportExportClient.php:21 Stack trace: #0 {main} thrown in /home/edmedu/www/hana-edu.co.kr/sf4l/vendor/aws/aws-sdk-php/src/ImportExport/ImportExportClient.php on line 21