Can't run Python code in Visual Studio Code with Jupyter - "Jupyter kernel cannot be started from 'Python 3.6.8 64-bit"

Message from Jupyter is not the best description of the issue, missing ipykernel package.

Fix was to install additional python package 'ipykernel' into virtual environment with Python 3.64 bit.

pip install ipykernel

Additional info: https://github.com/Microsoft/vscode-python/issues/3579