title: google cloud AI notebook save does not work
body: <p>I created  a deep learning instance inside the AI platform of google cloud . I use the built in jupyterlab notebooks running on the browser (I use chrome). Recently I have a problem with saving the code. autosave as well as saving the notebook files does not work. I keep see the message "saving started" when I try to save, but  nothing other than that happens, and the code is not saved. I tried restart the kernel as well as restart the instance but the problem keeps returning. Anyone here encountered the same thing? have a solution?</p>
  
  <p>thanks</p>