Error loading Jupyter Notebook Extensions

Question

I am using a Macbook with OS Sierra, and running Python 3.6.1 and Jupyter Notebook Server 5.0.0 I installed Jupyter Notebook extensions, following the instructions as mentioned

Answer 1

I had the same problem, but I notice in the README of jupyterlab this:

Prerequisites

Jupyter notebook version 4.3 or later. To check the notebook version:

jupyter notebook --version

So, try to check your version with that command, if returns a version lower than 4.3, try update it:

conda update notebook

That is how I solved the problem.