Fatal error: Uncaught Error: Class 'Aws\Api\Serializer\RestSerializer' not found in /Applications/XAMPP/xamppfiles/htdocs/Project_April/Aws/Api/Serializer/RestXmlSerializer.php:10 Stack trace: #0 {main} thrown in /Applications/XAMPP/xamppfiles/htdocs/Project_April/Aws/Api/Serializer/RestXmlSerializer.php on line 10