title: mybinder: Javascript Error: IPython is not defined
body: <p>I have created a jupyter notebook and created a mybinder from it. The notebook contains an interactive plot (matplotlib), which will update itself while the code is running. The cell looks like this:</p>
  <pre><code>%matplotlib notebook
  # do some plotting # 
  </code></pre>
  <p>The jupyter notebook itself works fine, the problems only occur when using jupyterlab via mybinder. It will then throw the following error:</p>
  <p><code>Javascript Error: IPython is not defined</code></p>
  <p>Any help is much appreciated!</p>