1.10 furnace.remove null stack error

[gdarai]

Hi, on 1.10, I want to remove charcoal furnace recipe:
CraftTweaker 3.0.26, + ModTweaker

furnace.remove(<minecraft:coal:1>);

Well this was working, but is not working any more... am I doing something wrong? Can there be some weird mod interaction? Where would you look for the fix? It says:

Error executing figuringFurnace.zs: stack cannot be null