System notification not working on ERPNext

We have created workflow in erpnext for material purchase in buying module. workflow is working properly. I am setting notification for each approval stage, but it is not working. My notification is saving successfully but the approver is not getting notification.
Material Request flow:
Purchase user-Project Manager-Accounts Manager-CFO.

I am setting notification for Project Manager. please find below the screenshot


@sapnapokhriyal288 Please Change workflow_state status because your workflow status is not match please share screenshot of your workflow all status

@sapnapokhriyal288 Write condition doc.workflow_state == “Pending with Project Manager”

Not working.

Set the Send Alert On as Value Change and set Value Changed as workflow_state(Workflow State)

This will work.