Fatal error: Uncaught Error: Class "Aws\Api\Serializer\RestSerializer" not found in /home/revofinancial/public_html/thirdparty/aws/Aws/Api/Serializer/RestJsonSerializer.php:11 Stack trace: #0 {main} thrown in /home/revofinancial/public_html/thirdparty/aws/Aws/Api/Serializer/RestJsonSerializer.php on line 11