Fatal error: Uncaught Error: Class "Aws\Api\Serializer\RestSerializer" not found in /home2/celtixg1/public_html/script/vendor/aws/aws-sdk-php/src/Api/Serializer/RestJsonSerializer.php:11 Stack trace: #0 {main} thrown in /home2/celtixg1/public_html/script/vendor/aws/aws-sdk-php/src/Api/Serializer/RestJsonSerializer.php on line 11