Script entry is this

mods.techreborn.centrifuge.addRecipe(enderore:dust_ender, minecraft:blaze_powder, null, null, techreborn:dust:19 * 2, null, 1840, 5);

Generates this error

https://gist.github.com/tgstyle/63502ce96339fe93b762baec453021ec

I believe it was due to this change

23ccd87#diff-5c3208eba10e5e4bbc08fac88f1c0236

•   	return null;
  

•   	return ItemStack.EMPTY;
  

Yeah, it would have been. Sorry about that, I should really get a full script that tests all the machines.