The game crashes.

When i try to link an elevator the game freezes for a second and then crashes. The log says this: "The game crashed whilst unexpected error
Error: java.lang.NoSuchMethodError: thut.lib.CompatWrapper.getStackSize(Lnet/minecraft/item/ItemStack;)I"

Steps to reproduce:

1. Build an elevatorplatform
2. Add the computer and stuff.
3. Link the elevator.
   And then it crashes.

• Thutcore:
• Minecraft: 1.12.2
• Forge:

Update your mods.