Answers for "TypeError: Cannot read property 'columnStart' of undefined at sendMailEdit(Code:2:15)"

TypeError: Cannot read property 'columnStart' of undefined at sendMailEdit(Code:2:15)

function sendMailEdit(e){
  if (e.range.columnStart != 4 || e.value != "Submitted") return;
  const rData = e.source.getActiveSheet().getRange(e.range.rowStart,1,1,15).getValues();
  let n = rData[0][1];
  let d = new Date(rData[0][0]).toLocaleDateString("en-US");
  let linkOfFile = rData[0][12];
  let loc = rData[0][1];
  let now = new Date().toLocaleString("en-US");
  
  let msg = "Estimate number " + n + " " + "has been submitted. The link for the Project/service file is " + linkOfFile + ". Please update CRM.";
 
  Logger.log(msg);
 GmailApp.sendEmail("[email protected],[email protected]", n + " Estimate submitted", msg)
  
}

function onEdit(e) { 
  var row = e.range.getRow();   
  var col = e.range.getColumn(); 
  
  if
  (col === 4 && row > 2){ 
    e.source.getActiveSheet().getRange(row,5).setValue(new Date());  
  }

}