Auto Approval of Invoice Workflow based on Event Parameters

Summary:

Business requirement is that when Project Billing Events are created via OIC, the invoices created for these events should be Auto-Approved. However, when the events are created manually by business users in Fusion, then the invoices for such events should follow a Workflow process.
We have tried using a Skip rule to meet this requirement, however, the system is showing an error "Error in evaluating Skip condition"

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