Fatal error: Uncaught Error: Class "Aws\Signature\SignatureV4" not found in D:\Proyectos\Conciliaciones\Composer\vendor\aws\aws-sdk-php\src\Signature\S3SignatureV4.php:20 Stack trace: #0 {main} thrown in D:\Proyectos\Conciliaciones\Composer\vendor\aws\aws-sdk-php\src\Signature\S3SignatureV4.php on line 20