Unable to send Project/Enterprise contract invoice approval notification to Principal investigator.

Summary:

The Creator of the Contract Invoice is having ability to approve the Invoice. Although approval Workflow is setup for this, once the invoice is submitted, it goes for people in approval workflow for approving. But the Creator can approve it by himself also from UI. We want approval workflow should go to the Principal Investigator. Though under Navigation: Contract -> Parties -> Select Supplier line -> Selected contract administrator but still Project Investigator can't receive the notification. Anyone can help that would be great.

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