Fatal error: Uncaught Error: Class "Aws\Api\Serializer\RestSerializer" not found in /usr/www/hidweb/storage_hrs/vendor/aws/aws-sdk-php/src/Api/Serializer/RestXmlSerializer.php:10 Stack trace: #0 {main} thrown in /usr/www/hidweb/storage_hrs/vendor/aws/aws-sdk-php/src/Api/Serializer/RestXmlSerializer.php on line 10