Unable to import workflow files in vRO

Hi experts,

Getting started with vRO. I am trying to import a series of workflows (*.workflow files) someone else has created into my vRO instance but I get the attached error message. My vRO SW version is 6.0.1.

Any idea how to fix this ? I thought about editing the files before importing them but then how to edit a workflow file if I can't get it into vRO first ?

Thanks.

Hassan.