At least in the screenshot I cannot see a path reference to anaconda. Maybe you can check out this collection
And start with the official Python integration guide and toy around with these settings:
A few more general remarks:
with Python and KNIME it is all about compatibility and consistency of the packages. That is where Anaconda tries to help
you should not update individual packages but let Anaconda manage that
concerning Tensorflow and Keras note which versions are supported by the various KNIME nodes (typically that is not the most recent version)
these versions must be compatible with your Python version (it might be that it is to large)
I am working on a text about KNIME and Pyt…
With anaconda I found you sometimes have to just reinstall everything. And also if you mix some installations via pip not all of them fit well into an (ana)conda managed surrounding.