``A mixin class in GTFO is crash with CEu (2.5.5?).
It is in recipe/mixins/RecipeMapFluidCannerMixin.
You use the checkLacingRecipes method to rewrite the findRecipe.
But the method

checkLacingRecipes(long voltage, List<ItemStack> inputs, List<FluidStack> fluidInputs, int outputFluidTankCapacity, boolean exactVoltage, CallbackInfoReturnable<Recipe> cir, Recipe recipe, Iterator var8, ItemStack input, ItemStack inputStack, ItemStack fluidHandlerItemStack, IFluidHandlerItem fluidHandlerItem)

is a error method.
The parameters of checkLacingRecipes is old.
New parameters:
findRecipe(long voltage, List<ItemStack> inputs, List<FluidStack> fluidInputs, boolean exactVoltage)

Crash Report:
here

It appears that you're using an unreleased version of CEu that I haven't prepared GTFO for currently. You can downgrade CEu to the latest released version for now (although hopefully that doesn't have any major glitches on it).

This is a good idea, but I think you'll need to be compatible with it at some point in the future.

Recently CEu has been rewriting and modifying the code more and more, maybe the author needs to wait until a more stable stage?

Just now, I wrote a fix myself, maybe you can open a new branche to receive him.