Hi Stjepan,
I built the NodePit Node Generator and I’m happy to support to get it working, but to be frank I cannot make much sense of the issue you mention.
Especially I’m having trouble to understand why KNIME would no longer work when installing a JDK - such a thing should not interfere with KNIME at all as KNIME brings its own bundled Java runtime (may a KNIME official correct me if I’m wrong).
So - please describe in more detail what you did and what happens (command line input, installations of which packages exactly, which KNIME version exactly do you use, which error messages do you see, any log messages, etc.)
Thank you!
-Philipp