量角器错误：在 Firefox 上执行“等待 WebDriver 服务器位于 http://127.0.0.1:50636/hub 时超时”

我在 Firefox 上执行脚本，收到一条 Firefox 升级通知，我将其关闭。再次开始执行，但出现如下错误，

Rohits-MacBook-Pro:FFAutomation rohitgathibandhe$ /Users/rohitgathibandhe/npm-global/lib/node_modules/protractor/bin/protractor conf.js
Report destination:   target/screenshots/Report.html
Using FirefoxDriver directly...
[launcher] Running 1 instances of WebDriver

/Users/rohitgathibandhe/npm-global/lib/node_modules/protractor/node_modules/selenium-webdriver/http/util.js:83
      Error('Timed out waiting for the WebDriver server at ' + url));
      ^
Error: Timed out waiting for the WebDriver server at http://127.0.0.1:50636/hub
at Error (native)
at onError (/Users/rohitgathibandhe/npm-global/lib/node_modules/protractor/node_modules/selenium-webdriver/http/util.js:83:11)
at Promise.invokeCallback_ (/Users/rohitgathibandhe/npm-global/lib/node_modules/protractor/node_modules/selenium-webdriver/lib/promise.js:1329:14)
at TaskQueue.execute_ (/Users/rohitgathibandhe/npm-global/lib/node_modules/protractor/node_modules/selenium-webdriver/lib/promise.js:2790:14)
at TaskQueue.executeNext_ (/Users/rohitgathibandhe/npm-global/lib/node_modules/protractor/node_modules/selenium-webdriver/lib/promise.js:2773:21)
at /Users/rohitgathibandhe/npm-global/lib/node_modules/protractor/node_modules/selenium-webdriver/lib/promise.js:2652:27
at /Users/rohitgathibandhe/npm-global/lib/node_modules/protractor/node_modules/selenium-webdriver/lib/promise.js:639:7
at process._tickCallback (node.js:406:9)
From: Task: WebDriver.createSession()
at acquireSession (/Users/rohitgathibandhe/npm-global/lib/node_modules/protractor/node_modules/selenium-webdriver/lib/webdriver.js:62:22)
at Function.createSession (/Users/rohitgathibandhe/npm-global/lib/node_modules/protractor/node_modules/selenium-webdriver/lib/webdriver.js:295:12)
at Driver (/Users/rohitgathibandhe/npm-global/lib/node_modules/protractor/node_modules/selenium-webdriver/firefox/index.js:271:38)
at [object Object].DirectDriverProvider.getNewDriver (/Users/rohitgathibandhe/npm-global/lib/node_modules/protractor/built/driverProviders/direct.js:76:16)
at [object Object].Runner.createBrowser (/Users/rohitgathibandhe/npm-global/lib/node_modules/protractor/built/runner.js:203:37)
at /Users/rohitgathibandhe/npm-global/lib/node_modules/protractor/built/runner.js:293:21
at _fulfilled (/Users/rohitgathibandhe/npm-global/lib/node_modules/protractor/node_modules/q/q.js:834:54)
at self.promiseDispatch.done (/Users/rohitgathibandhe/npm-global/lib/node_modules/protractor/node_modules/q/q.js:863:30)
at Promise.promise.promiseDispatch (/Users/rohitgathibandhe/npm-global/lib/node_modules/protractor/node_modules/q/q.js:796:13)
at /Users/rohitgathibandhe/npm-global/lib/node_modules/protractor/node_modules/q/q.js:556:49
[launcher] Process exited with error code 1

我的配置文件如下，

var HtmlScreenshotReporter = require('protractor-jasmine2-screenshot-reporter');

var reporter = new HtmlScreenshotReporter({
  dest: 'target/screenshots',
  filename: 'Report.html',
  reportTitle: 'Execution Report',
  showSummary: true,
  showQuickLinks: true,
  pathBuilder: function(currentSpec, suites, browserCapabilities) {
  // will return chrome/your-spec-name.png
  return browserCapabilities.get('browserName') + '/' + currentSpec.fullName;
 }
 });

exports.config = {

directConnect: true,
//seleniumAddress: 'http://localhost:4444/wd/hub',
capabilities: {'browserName': 'firefox'},
framework: 'jasmine',
specs: ['Login_spec2.js','Article_spec.js'],
allScriptsTimeout: 200000,
getPageTimeout: 200000,
jasmineNodeOpts: {
    defaultTimeoutInterval: 200000
},

 // Setup the report before any tests start
  beforeLaunch: function() {
    return new Promise(function(resolve){
    reporter.beforeLaunch(resolve);
  });
 },
  // Close the report after all tests finish
  afterLaunch: function(exitCode) {
   return new Promise(function(resolve){
    reporter.afterLaunch(resolve.bind(this, exitCode));
  });
},

onPrepare: function() {
    var width = 1300;
    var height = 1200;
    browser.driver.manage().window().setSize(width,height);
    jasmine.getEnv().addReporter(reporter);
    afterAll(function(done) {
        process.nextTick(done);
    })
 }

 };

其他细节是： 其他详情如下：[电子邮件受保护] /cdn-cgi/l/email-protection，node版本：4.2.4，npm版本：2.14.12，茉莉花：2.4.1，selenium-webdriver：2.52.0，firefox：47

请帮助我解决这个问题。

您必须执行以下操作才能使其正常工作：

• upgrade protractor到最新的（当前为 3.3.0）版本，该版本还将带来 selenium-webdriver 2.53
• 降级火狐浏览器升级到46版本 https://ftp.mozilla.org/pub/firefox/releases/46.0.1/并且暂时不要让它更新（有兼容性问题 https://github.com/SeleniumHQ/selenium/issues/2257)