我已經做了幾天了，我已經從 Electron GitHub 克隆了電子快速啟動（https://github.com/electron/electron-quick-start）我收到了這個錯誤，但它不是t 只為這個應用程序，它是所有的應用程序。我不知道發生了什么。電子最新版本：8.2.0 錯誤app.whenReady().then(createWindow)     ^TypeError: Cannot read property 'whenReady' of undefined    at Object.<anonymous> (/Users/user/Downloads/electron-quick-start-master/main.js:25:5)    at Module._compile (internal/modules/cjs/loader.js:1147:30)    at Object.Module._extensions..js (internal/modules/cjs/loader.js:1167:10)    at Module.load (internal/modules/cjs/loader.js:996:32)    at Function.Module._load (internal/modules/cjs/loader.js:896:14)    at Function.executeUserEntryPoint [as runMain] (internal/modules/run_main.js:71:12)    at internal/main/run_main_module.js:17:47代碼：const electron = require('electron')// Modules to control application life and create native browser windowconst {app, BrowserWindow} = require('electron')const path = require('path')function createWindow () {  // Create the browser window.  const mainWindow = new BrowserWindow({    width: 800,    height: 600,    webPreferences: {      preload: path.join(__dirname, 'preload.js')    }  })  // and load the index.html of the app.  mainWindow.loadFile('index.html')  // Open the DevTools.  // mainWindow.webContents.openDevTools()}// This method will be called when Electron has finished// initialization and is ready to create browser windows.// Some APIs can only be used after this event occurs.app.whenReady().then(createWindow)// Quit when all windows are closed.app.on('window-all-closed', function () {  // On macOS it is common for applications and their menu bar  // to stay active until the user quits explicitly with Cmd + Q  if (process.platform !== 'darwin') app.quit()})app.on('activate', function () {  // On macOS it's common to re-create a window in the app when the  // dock icon is clicked and there are no other windows open.  if (BrowserWindow.getAllWindows().length === 0) createWindow()})