Selenium Chromedriver 2.25运行报错：
System.InvalidOperationException : unknown error: cannot determine loading status from unknown error: missing or invalid 'entry.level' (Session info: chrome=63.0.3239.84) (Driver info: chromedriver=2.25.426923 (0390b88869384d6eb0d5d09729679f934aab9eed),platform=Windows NT 10.0.15063 x86_64) at OpenQA.Selenium.Remote.RemoteWebDriver.UnpackAndThrowOnError(Response errorResponse)
这应该是Chromedriver 2.25与Chrome 63不兼容，升级Chromedriver到2.34可解决。
Chromedriver最新版本下载：
https://sites.google.com/a/chromium.org/chromedriver/downloads