I recently ran into the same issue after manually installing a fresh version of ChipWhisperer from GitHub in an Ubuntu VM. It seems that notebook version 7 is based on JupyterLab and does not support the “%matplotlib notebook” magic to enable interactive plots.
I was able to ‘fix’ this by installing ipympl into my cw pyenv
(cw) vm:~/chipwhisperer$ pip install ipympl
and replacing
%matplotlib notebook
with
%matplotlib widget
in the Jupyter notebook code.