title: VS2013: Error Loading Solution ('JavascriptWebExtensionsPackage did not load correctly')
body: <p>Visual Studio 2013 Professional just started throwing this error on me, in the middle of switching solutions.     A full reboot of the computer didn't resolve it.</p>
  <p>Here's the error I see when I try loading a solution:
  <img src="https://i.stack.imgur.com/3P24p.png" alt="main error" /></p>
  <p>Now, when I go look at the log file it suggests, I see this:</p>
  <p><img src="https://i.stack.imgur.com/ROia7.png" alt="SetSite failed" /></p>
  <blockquote>
  <p>SetSite failed for package [JavaScriptWebExtensionsPackage]</p>
  <p>End package load [JavaScriptWebExtensionsPackage]</p>
  </blockquote>
  <p>If I click &quot;Yes&quot; to continuing to show the message, and try loading up a file in the solution -- I get this message:</p>
  <p><img src="https://i.stack.imgur.com/m65UW.png" alt="NoEditorOptionDefinition export found" /></p>
  <p>Telling me that <code>No EditorOptionDefinition export found for the given option name: Tabs/ConvertTabsToSpaces - Parameter name: optionId</code>.</p>
  <p>I really do not know what to make of this.   I didn't do anything except check in some files to TFS (which I do dozens of times a day, a week, a year).   The <em>only</em> thing I ever did differently that I never did before was attempt to view Source&gt;Annotations on a file (I've never did that in my life with TFS/VS) about 10 minutes prior - but that worked fine and was just ducky.</p>
  <p>So - any ideas why I'm getting this message - and how to resolve it without a fullblown re-install?</p>