Could you make sure your version and setup of KNIME and R is up and running?
The new KNIME 4.4 offers an environment propagation for R via conda, although I have not yet found an example I could offer:
https://www.knime.com/whats-new-in-knime-44#conda-r
And frankly I would have to do more experimentation with the
https://hub.knime.com/knime/extensions/org.knime.features.python2/latest/org.knime.python2.nodes.conda.CondaEnvironmentPropagationNodeFactory
In oder to realise the full potential.
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