Fatal error: Uncaught Error: Class 'Aws\Api\Serializer\RestSerializer' not found in /home/app/htdocs/lidia/vendor/aws/aws-sdk-php/src/Api/Serializer/RestXmlSerializer.php:10 Stack trace: #0 {main} thrown in /home/app/htdocs/lidia/vendor/aws/aws-sdk-php/src/Api/Serializer/RestXmlSerializer.php on line 10