Fatal error: Uncaught Error: Class "Aws\Multipart\AbstractUploader" not found in E:\phpProject\TEST\fr_epr\fr_epr_reg\vendor\aws\aws-sdk-php\tests\Multipart\TestUploader.php:13 Stack trace: #0 {main} thrown in E:\phpProject\TEST\fr_epr\fr_epr_reg\vendor\aws\aws-sdk-php\tests\Multipart\TestUploader.php on line 13