title: Unable to save Jupyter Notebook in VSC
body: <p>I've made changes to .ipynb-file in Visual Studio Code, but I'm unable to save it. I've tried 4 ways and each of them doesn't work:</p>
  <ol>
  <li>Ctrl + S (nothing happens)</li>
  <li>Via File &gt; Save (is permanent greyed out)</li>
  <li>Via File &gt; Save As... (nothing happends, no pop-up of the window explorer)</li>
  <li>Pressing the save-button in the notebook (nothing happens)</li>
  </ol>
  <p>As you can see in the screenshot below, marked with the star, there are changes to save.
  What do I do wrong or how to solve this issue?</p>
  <p><a href="https://i.stack.imgur.com/sFSBJ.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/sFSBJ.png" alt="Printscreen for saving Jupyter Notebook" /></a></p>