title: How can I fix a JupyterLab "Code Editor out of Sync" error message?
body: <p>I am seeing the error message in my JupyterLab.:</p>
  <pre><code>&quot;Code Editor out of Sync. 
  Please open your browser JavaScript console for bug report instructions&quot; 
  </code></pre>
  <p>Jupyter Lab version 3.0.3 and Python version 3.7.7. I'm using both Chrome and Safari. I am still seeing the same issue.</p>
  <p><a href="https://i.stack.imgur.com/SJrFg.png" rel="noreferrer"><img src="https://i.stack.imgur.com/SJrFg.png" alt="enter image description here" /></a></p>