title: Visual Studio 2013 Process Editor - Empty "Select Work Item Type" dialog
body: <p>I'm trying to edit the work item types on our TFS server and the "Select Work Item Type" dialog I am seeing is empty. I've been using VS2013 to edit the work item template for Product Backlog Item. But this suddenly happened where the dialog is blank.</p>
  
  <p>Has anyone seen this same issue?</p>