title: Python 3 Jupiter Notebook FORBIDDEN to be saved
body: <p>I have Anaconda Navigator 1.8.4 with Python 3</p>
  
  <p>I launched a Jupiter Notebook and tried to rename and save.</p>
  
  <p>I have a "FORBIDDEN" message:</p>
  
  <p>[W 17:34:45.280 NotebookApp] Terminals not available (error was DLL load failed: %1 is not a valid Win32 application.)
  [I 17:34:45.625 NotebookApp] JupyterLab beta preview extension loaded from C:\Users\Toly_Novik\Anaconda3\lib\site-packages\jupyterlab
  [I 17:34:45.625 NotebookApp] JupyterLab application directory is C:\Users\Toly_Novik\Anaconda3\share\jupyter\lab
  [I 17:34:45.971 NotebookApp] Serving notebooks from local directory: C:\Users\Toly_Novik
  [I 17:34:45.971 NotebookApp] 0 active kernels
  [I 17:34:45.971 NotebookApp] The Jupyter Notebook is running at:
  [I 17:34:45.971 NotebookApp] <a href="http://localhost:8888/?token=76e4506e4a8b99e55400b3bcbb88ea1845477fb0599ec771" rel="nofollow noreferrer">http://localhost:8888/?token=76e4506e4a8b99e55400b3bcbb88ea1845477fb0599ec771</a>
  [I 17:34:45.972 NotebookApp] Use Control-C to stop this server and shut down all kernels (twice to skip confirmation).
  [C 17:34:45.984 NotebookApp]</p>
  
  <p>Copy/paste this URL into your browser when you connect for the first time,
  to login with a token:
  <a href="http://localhost:8888/?token=76e4506e4a8b99e55400b3bcbb88ea1845477fb0599ec771" rel="nofollow noreferrer">http://localhost:8888/?token=76e4506e4a8b99e55400b3bcbb88ea1845477fb0599ec771</a>
  [I 17:34:46.716 NotebookApp] Accepting one-time-token-authenticated connection from ::1</p>
  
  <p>I posted link into the browser as instructed. It opened a new Notebook but I have the same issue.</p>
  
  <p>I have never seen these "tokens" used before.</p>
  
  <p>Can you help in renaming and saving my work in a new notebook?</p>