Error executing "Run ProGP Tool" step in ArcGIS Online Workflow

[DiegoLlamasOlivares]

Hello, 

I am trying to run a step using a Phython tool that we made to create automatic assigments to users in Workforce.  We create a Pro project and a new toolbox and add the python this is how I understand the steep needs to be configured  as mention in this link https://doc.arcgis.com/en/workflow-manager/latest/help/run-pro-gp-tool.htm

and every time i try to run the step i get an error "step failed, invalid step argiments"

i know i am doing something wrong, but i do not know what.

any idea? what is wrong with this step? the path is incorrect?

Thanks,

DLL