Nhờ fix script gộp dữ liệu từ các spreadsheet trong cùng folder gg driver

[teaklee]

Mình tìm dc code này, dùng để merge các file trong cùng 1 folder lại, nhưng khi mình chạy thì nó báo lỗi

function myFunction() {
  var myFolder = DriveApp.getFolderById("15fzUjiZsPbvchmFBy0UTkitUkHuA4pfQ");
  var spreadSheets = myFolder.getFilesByType("application/vnd.google-apps.spreadsheet");
 
  var master_files = DriveApp.getFilesByName("MergedNew")
    
  if (master_files.hasNext()){
     var master_file=master_files.next();
     var newSpreadSheet = SpreadsheetApp.openById(master_file.getId());
     }
  else {
    var newSpreadSheet = SpreadsheetApp.create("MergedNew");
    newSpreadSheet.getSheets()[0].setName("B data");
  }
 
  var bSheet = newSpreadSheet.getSheetByName("B data");
  while(spreadSheets.hasNext())
  {
    var sheet = spreadSheets.next();
    var spreadSheet = SpreadsheetApp.openById(sheet.getId());
    var sh = spreadSheet.getSheetByName('T7-2022');
    var data = sh.getRange(2,1,sh.getMaxRows(),sh.getMaxColumns()).getValues();
  
    var filtered_data = data.filter(function (row) {
    return row[0] != ""; //
  });
  
    if (bSheet.getLastRow() == 0){
      var headers = sh.getRange(1,1,1,sh.getMaxColumns()).getValues();
      bSheet.getRange(1,1,1,sh.getMaxColumns()).setValues(headers);
    }
  
    bSheet.getRange(bSheet.getLastRow()+1,1,filtered_data.length,filtered_data[0].length).setValues(filtered_data);
  }     
}

Lúc thì nó báo:

Error
TypeError: Cannot read property 'getRange' of null
myFunction
@ Code.gs:23

Lúc thì nó lại báo
Error
TypeError: Cannot read property 'getRange' undefine

Mong các bác hỗ trợ ạ