If a workflow is running on a page and it is in Approver action step where reviewer reviews the contents and approve/rejects the contents. But someone accidentally deleted the page on which WF is running. In such scenario what should be the WF behaviour.? Is there any way to end the WF? Currently, in AEM inbox is showing "unknown resource " in red color and when approve taking action rotating (loading). The reason is there is no resource available. 
I would like to end the workflow and send the mail to Author.