ModuleNotFoundError: No module named 'google.cloud'

@anguslou it is possible to transfer the content of Flow Variables to and from Jupyter notebooks from within KNIME. It is not very elegant though:

Please also note the option to only execute parts of the Jupyter notebook (only tagged fields) in order to make the cooperation more comfortable.

Though it might be that this is not the problem in your case. Would it be possible to provide a minimal example or a log in debug mode.