Fatal error: Uncaught Error: Class 'Aws\Api\Serializer\QueryParamBuilder' not found in C:\xampp\htdocs\webservices\2911inovarservice-order\vendor\aws\aws-sdk-php\src\Api\Serializer\Ec2ParamBuilder.php:10 Stack trace: #0 {main} thrown in C:\xampp\htdocs\webservices\2911inovarservice-order\vendor\aws\aws-sdk-php\src\Api\Serializer\Ec2ParamBuilder.php on line 10