GASのエラー（App Scriptでドロップダウンリストを作りたい）

var mainWsName = "Input";
var optionsWsName = "Product List";
var firstLevelColumn = 2;
var secondLevelColumn = 3;
var thirdLevelColumn = 4;


var ws = SpreadsheetApp.getActiveSpreadsheet().getSheetByName(mainWsName);
var wsOptions = SpreadsheetApp.getActiveSpreadsheet().getSheetByName(optionsWsName);
var options = wsOptions.getRange(2, 1,wsOptions.getLastRow()-1,3).getValues();



function onEdit(activeCell){
  var activeCell = ws.getActiveCell();
  var val = activeCell.getValue();
  var r = activeCell.getRow();
  var c = activeCell.getColumn();
  var wsName = activeCell.getSheet().getName();
  if(wsName === mainWsName && c === firstLevelColumn && r > 1){
    applyFirstLevelValidation(val,r);   
  } else if(wsName === mainWsName && c === secondLevelColumn && r > 1){
    applySecondLevelValidation(val,r); 
  } 


} //end onEdit

function applyFirstLevelValidation(val,r){

   if(val === ""){
      ws.getRange(r, secondLevelColumn).clearContent();
      ws.getRange(r, secondLevelColumn).clearDataValidations();     
    } else {
      ws.getRange(r, secondLevelColumn).clearContent();
      ws.getRange(r, secondLevelColumn).clearDataValidations();
      var filteredOptions = options.filter(function(o){ return o[0] === val });
      var listToApply = filteredOptions.map(function(o){ return o[1] });
      var cell = ws.getRange(r, secondLevelColumn);
      applyValidtionToCell(listToApply,cell); 
    } 

}





function applyValidtionToCell(list,cell){


 var rule = SpreadsheetApp
 .newDataValidation()
 .requireValueInList(list)
 .setAllowInvalid(false) 
 .build();

  cell.setDataValidation(rule);
}