Fatal error: Uncaught Error: Class 'Aws\AwsClient' not found in /home/edmedu/www/edmclass.com.bak/edmclass-front/vendor/aws/aws-sdk-php/src/Iot/IotClient.php:520 Stack trace: #0 {main} thrown in /home/edmedu/www/edmclass.com.bak/edmclass-front/vendor/aws/aws-sdk-php/src/Iot/IotClient.php on line 520