Fatal error: Uncaught Error: Class 'Aws\S3\MultipartUploader' not found in /data/newpmo/web/plugin/aws_s3/Aws/S3/Crypto/S3EncryptionMultipartUploader.php:15 Stack trace: #0 {main} thrown in /data/newpmo/web/plugin/aws_s3/Aws/S3/Crypto/S3EncryptionMultipartUploader.php on line 15