title: Python requires ipykernel to be installed
body: <p>I encounter an issue when I use the Jupyter Notebook in VS code. The screen shows &quot;<code>Python 3.7.8 requires ipykernel to be installed</code>&quot;. I followed the pop-up to install ipykernel. It still does not work. The screenshot is attached. It bothers me a lot. Could anyone help me with it? Tons of thanks.</p>
  <p><img src="https://i.stack.imgur.com/xilfw.png" alt="Screenshot of VSCode displaying the error message." /></p>