Fatal error: Uncaught Error: Class 'Aws\Multipart\AbstractUploadManager' not found in /var/www/html/stz-api/vendor/aws/aws-sdk-php/src/S3/MultipartCopy.php:9 Stack trace: #0 {main} thrown in /var/www/html/stz-api/vendor/aws/aws-sdk-php/src/S3/MultipartCopy.php on line 9