XGBoost nodes not loading in Classic UI

Hello everyone,

I’m having trouble getting the XGBoost Integration nodes to work on Fedora Linux.

The extension is installed correctly, but whenever I try to add an XGBoost Tree Ensemble Learner (or any other XGBoost node) in Classic UI, KNIME shows the message:

Node cannot be created.
The selected node could not be created due to the following reason:
ml/dmlc/xgboost4j/java/XGBoostError

In Modern UI, the XGBoost nodes do not appear at all (I understand they haven’t been ported yet), but in Classic UI they fail to load.

My setup

  • OS: Fedora Linux (x86_64)

  • KNIME version: 5.8.0 STS

  • Extension: KNIME XGBoost Integration (latest from official update site)

  • Java: bundled JRE shipped with KNIME

Could you please help me?