title: Team Foundation Server 2012 broken web access - Error TF400893
body: <p>I have installed TFS 2012 Express on my computer but I can't get TFS web access portal to work. If I try to view a page with work items I get error:</p>
  
  <pre><code>TF400893: Team Foundation Server services are not available. 
  This is most likely caused by a network error. 
  Please check your connection and try again.
  </code></pre>
  
  <p>It's weird because other parts of the TFS web portal works (e.g. source) so I don't think it's network error. If I connect to the TFS server from Visual Studio everything is working, so I suppose TFS service is running.</p>
  
  <p>I tried to reinstall TFS, but it didn't help :-(</p>
  
  <p>Any ideas what can be wrong?</p>