@Milovanova I think you would have to follow the precise Python versions and packages that are recommended for the deep learning integrations in KNIME. I found that sometimes even the repository channel you use might play a role with standard anaconda more stable than conda-forge.
https://docs.knime.com/latest/python_installation_guide/index.html#_introduction
It will be very interesting to see a better integration of newer python packages in the upcoming winter release of KNIME mentioned by @temesgen-dadi