Fatal error: Uncaught Error: Class 'Aws\AwsClient' not found in /home/edmedu/www/edmeducation.co.kr/tw-dev/vendor/aws/aws-sdk-php/src/ARCZonalShift/ARCZonalShiftClient.php:21 Stack trace: #0 {main} thrown in /home/edmedu/www/edmeducation.co.kr/tw-dev/vendor/aws/aws-sdk-php/src/ARCZonalShift/ARCZonalShiftClient.php on line 21