Fatal error: Uncaught Error: Class "Aws\Identity\AwsCredentialIdentity" not found in C:\WebServer\htdocs\bookshelf\vendor\aws\aws-sdk-php\src\Credentials\Credentials.php:10 Stack trace: #0 {main} thrown in C:\WebServer\htdocs\bookshelf\vendor\aws\aws-sdk-php\src\Credentials\Credentials.php on line 10