As far as I'm aware the only possible options for the "category" tab are: equipment, building, misc, and redstone (defaults to misc) - a lot of the pilots have the category: "pilots" set. Technically this throws errors on kubejs but the recipe itself is still there. It might work fine with other stuff going on in the mod, but another guy had the same issue. Changing the category tag in polished_calcite_pilot for e.g. from pilots to misc will stop the kubejs error throwing.

It's only the pilots that have this issue, in mod/recipe/pilots, and all 22 of them have the same issue

I'm a bit lazy but that's the screenshot and it's literally just that for all of the possible pilots. Cheers

Just pushed the fix, thanks for the issue!