Not all Redfield conformal prediction nodes will install


I am trying to test some of the Refield conformal prediction workfows, but some of the nodes will not install (Knime 4.5.2), and I seem to be caught in a loop:

Cannot complete the request. See the error log for details.
“Redfield Conformal Prediction Nodes” will be ignored because it is already installed.

But clearly some nodes are missing, specifically the Regression nodes.

Please advise/Evert