title: Sitecore content editor will not load
body: <p>A bad assembly or sublayout has been added to our Sitecore environment resulting in the content editor area being gray with no items to click on... </p>
  
  <p><img src="https://i.stack.imgur.com/ajv2W.png" alt="enter image description here"></p>
  
  <p>Here's what I've done..</p>
  
  <ol>
  <li>Deleted all custom sublayouts with their assemblies from the date in question.</li>
  <li>Cleared the website/temp folder.</li>
  <li>Refreshed IIS site &amp; did a recycle on app pool &amp; IIS reset.</li>
  </ol>
  
  <p>UPDATE: Most js errors seem to be uncaught reference errors..
  <img src="https://i.stack.imgur.com/V3Gjo.png" alt="enter image description here"></p>
  
  <p>Still cannot get the content editor to appear. No errors in log.
  Please advise.. </p>