S3 backup says successful - no files actually uploaded

Hi.

Got my virtualmin configured to backup 1 file per domain.
When it runs, whether on a schedule or not, it runs through, and everything is reported at working, as below:

Uploading archive to Amazon’s S3 service …
… done

However, the files would should be uploaded to my s3 account are not there.

I have no idea where the files are, but virtualmin thinks its working… I tried running the command on the terminal,
virtualmin backup-domain --all-domains --dest s3:///backups/backup-%Y-%M-%d --newformat --all-features --strftime

It ran ok, but then reported the following at the end… any ideas?

Uploading archive to Amazon’s S3 service …

The config profile () could not be found

Are these 2 things linked?

Thanks.

Morty