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Could not find path error while creating Supplier Scorecard Variable

I am trying to setup ERPNEXT for supplier evaluation. In order to achieve that, I want to create a new Supplier Scorecard Variable called supplier consistency. The error message I get is Could not find path supplier_consistency.

I have done some research online and I found out that I will have to create this new path myself on the server side before I can create the new variable.

Can someone please help me on how to go about this with clear steps for me to follow.
Thanks guys.