Fatal error: Uncaught Error: Interface "Aws\AwsClientInterface" not found in C:\WebServer\htdocs\bookshelf\vendor\aws\aws-sdk-php\src\S3\S3ClientInterface.php:237 Stack trace: #0 {main} thrown in C:\WebServer\htdocs\bookshelf\vendor\aws\aws-sdk-php\src\S3\S3ClientInterface.php on line 237