title: Save failed in Google Colab
body: <p>I opened a number of tabs at the same time. I think that's why Google Colab was not able to support the heavy load. The message stated:</p>
  <blockquote>
  <p><strong>Save failed</strong></p>
  <p>This file could not be saved. Please use the File menu to download the .ipynb and upload the notebook to make a copy that includes your recent changes.</p>
  </blockquote>
  <p>Is downloading the file and uploading again the only solution?</p>