title: VS2013 Account Sign In "Script Error" The Value of the property 'evt_LoginMobile_onload" is null or undefined
body: <p>I am using Visual Studio 2013 on Windows 8.1, I already sign in with my Live ID.</p>
  
  <p>I try to connect to TFS, VS tries to show me login popup but I get a white popup window then a script error popup that says</p>
  
  <p>an error has occurred in the script on this page, it says the value of the property 'evt_LoginMobile_online' is null or undefined, not a function object</p>
  
  <p>Code: 0</p>
  
  <p>URL: <a href="https://login.live.com/login.srf?wa=wsignin1.0&amp;wtrealm=https%3a%2f%2faccesscontrol.windows.net%2f&amp;wreply=https%3a%2f%2ftfsprodch1acs01.accesscontrol.windows.net%2fv2%" rel="noreferrer">https://login.live.com/login.srf?wa=wsignin1.0&amp;wtrealm=https%3a%2f%2faccesscontrol.windows.net%2f&amp;wreply=https%3a%2f%2ftfsprodch1acs01.accesscontrol.windows.net%2fv2%</a></p>
  
  <p>It asks me if I want to continue running scripts.  When i click yes or no, I still get the same white page and nothing happens.</p>
  
  <p><img src="https://i.stack.imgur.com/J35FR.jpg" alt="enter image description here"></p>