Fatal error: Uncaught Error: Class "Aws\Multipart\AbstractUploader" not found in D:\Proyectos\Conciliaciones\Composer\vendor\aws\aws-sdk-php\src\S3\MultipartUploader.php:15 Stack trace: #0 {main} thrown in D:\Proyectos\Conciliaciones\Composer\vendor\aws\aws-sdk-php\src\S3\MultipartUploader.php on line 15