The TNB framework depends on the fabric8io.kubernetes-client of version 5.12 (at the time of writing this DOC) but the latest CRD generator requires dependencies from kubernetes-client version 6.x.
The io.fabric8:java-generator-cli:6.0.0 seems to be free from those dependencies and it is working with the current TNB framework setup.
- Download the CRD locally since you may need to tweak it
jbang io.fabric8:java-generator-cli:6.0.0 -s ${CRD_SOURCE_FOLDER} -t ${OUTPUT_FOLDER}