title: Interface Builder - Failed to load designables from path (null)
body: <p>I have some custom controls I have created and I'm them using in a new project. However, I keep getting errors in interface builder:</p>
  
  <pre><code>Failed to update auto layout status: Failed to load designables from path (null)
  </code></pre>
  
  <p>or</p>
  
  <pre><code>Failed to render instance of &lt;control&gt;: Failed to load designables from path (null)
  </code></pre>
  
  <p>I've tested out the controls in another project and they seem to render correctly in interface builder, but I cannot get them to work in the current project. What causes this error and how might I fix it?</p>
  
  <p>Thanks in advance...</p>