Dependency will cause jupyter notebook to crash

[tnlin]

In case of anyone who bump into this problem.

/Users/tnlin/anaconda3/lib/python3.6/site-packages/notebook/base/zmqhandlers.py:284: RuntimeWarning: coroutine 'WebSocketHandler.get' was never awaited
  super(AuthenticatedZMQStreamHandler, self).get(*args, **kwargs)
[W 11:53:18.115 NotebookApp] Replacing stale connection: e1c43480-dd1f-4837-b57d-197e2e20fdb9:24e703ae04c9484c896ecbd5c506b419

My jupyter notebook fail to connect the kernel after install the dependency tornado-6.0.3
I solve the issue by downgrading it: pip install tornado==5.1.1

For for details, see: jupyter/notebook#4437

Here are my dependencies:

Python 3.6.9
jupyter==1.0.0
jupyter-client==5.2.3
jupyter-console==6.0.0
jupyter-contrib-core==0.3.3
jupyter-contrib-nbextensions==0.4.0
jupyter-core==4.4.0
jupyter-highlight-selected-word==0.1.0
jupyter-latex-envs==1.4.6
jupyter-nbextensions-configurator==0.4.0
jupyterlab==0.32.1
jupyterlab-launcher==0.10.5
jupyterthemes==0.18.9
notebook==5.5.0