Fatal error: Uncaught Error: Class 'Aws\Api\Serializer\RestSerializer' not found in C:\gen\ms_core\DiscordApi\vendor\aws\aws-sdk-php\src\Api\Serializer\RestXmlSerializer.php:10 Stack trace: #0 {main} thrown in C:\gen\ms_core\DiscordApi\vendor\aws\aws-sdk-php\src\Api\Serializer\RestXmlSerializer.php on line 10