Fatal error: Uncaught Error: Class 'Aws\AwsClient' not found in /data/newpmo/web/plugin/aws_s3/Aws/MTurk/MTurkClient.php:87 Stack trace: #0 {main} thrown in /data/newpmo/web/plugin/aws_s3/Aws/MTurk/MTurkClient.php on line 87