Restrict Submission of Approval Request if certain field is not populated using Custom Error in Flow #inSalesforce

Restrict Submission of Approval Request if certain field is not populated using Custom Error in Flow #inSalesforce

Prerequisite: Approval Process Tries to update the Stage to Negotiation/Review when Submitted for Approval

Create an opportunity record triggered flow, on create and update and Fast field Updates selected. Criteria: StageName equals Negotiation/Review and Amount isnull True

Add Custom Error: On the Record Page. Provide the message like You can't submit the Opportunity if Amount field is blank