Error trying to execute "import" CSV workflow from Architect

I was trying to execute a workflow from architect for importing a CSV into a table. I got this error message:

Could not load file or assembly ‘FileHelpers, Version=, Culture=neutral, PublicKeyToken=3e0c08d59cc3d657’ or one of its dependencies. The system cannot find the file specified.

It works when running the workflow from the website just not directly from architect.