Jupyter notebook: No connection to server because websocket connection fails

Question

I have just installed Jupyter over pip (Python version is 3.7.2) in Windows 10, started the jupyter server by calling jupyter notebook, created a new notebook w

Answer 1

The problem was that there was an incompatibility between the packages tornado 6 and notebook 5.7.4. notebook was updated on March 6th 2019 in order to solve this issue. Right now, the best way to solve it is the following:

Using pip

$ pip install -U jupyter

Using pipenv

$ pipenv update jupyter