For some reason, the plug-in seems to fail to load the following Custom Item Set file when run in minecraft 1.14. The /kci debug command doesn't snow any potential errors, but states that there are 0 custom items.
customitemsv1.txt

It appears that knokko core was outdated. But, /kci debug should have detected that. I should investigate why not.

I can't reproduce this failure myself. I asked the user for more details.

The user used an outdated version of KC for 1.14. When I try this myself, the debug command will just detect it. I will close this because I can't reproduce it and it is not a huge problem.