title: Jupyter: can't create new notebook?
body: <p>I have some existing Python code that I want to convert to a Jupyter notebook. I have run: </p>
  
  <pre><code>jupyter notebook
  </code></pre>
  
  <p>Now I can see this in my browser:</p>
  
  <p><a href="https://i.stack.imgur.com/Qsz65.png" rel="noreferrer"><img src="https://i.stack.imgur.com/Qsz65.png" alt="enter image description here"></a></p>
  
  <p>But how do I create a new notebook? The <code>Notebook</code> link in the menu is greyed out, and I can't see any other options to create a new notebook.</p>
  
  <p>I've noticed this on the command line while Jupyter is running: </p>
  
  <pre><code>[W 22:30:08.128 NotebookApp] Native kernel (python2) is not available 
  </code></pre>