title: CreatingJupyter Notebook Failed: error to write a readonly database
body: <p>I have installed Jupyter notebook.
  with python 3</p>
  
  <p>When I try to create a new notebook file, I get a pop up windows saying:
  <a href="https://i.stack.imgur.com/8uBiq.png" rel="nofollow noreferrer">Pop up error</a>
  An error occurred while creating a new notebook.
  Unexpected error while saving file: Untitled.ipynb attempt to write a readonly database</p>
  
  <p>From the terminal:</p>
  
  <pre><code>[W 20:00:11.307 NotebookApp] 500 POST /api/contents (127.0.0.1): Unexpected error while saving file: Untitled.ipynb attempt to write a readonly database         
  [W 20:00:11.307 NotebookApp] Unexpected error while saving file: Untitled.ipynb attempt to write a readonly database
  </code></pre>