[00:11:56] [Server thread/ERROR] [gregtech]: Invalid amount of recipe inputs. Actual: 2. Should be between 1 and 1 inclusive.
[00:11:56] [Server thread/ERROR] [gregtech]: Stacktrace:
java.lang.IllegalArgumentException: null
    at gregtech.api.recipes.RecipeBuilder.validate(RecipeBuilder.java:272) [RecipeBuilder.class:?]
    at gregtech.api.recipes.RecipeBuilder.finalizeAndValidate(RecipeBuilder.java:259) [RecipeBuilder.class:?]
    at gregtech.api.recipes.builders.SimpleRecipeBuilder.build(SimpleRecipeBuilder.java:28) [SimpleRecipeBuilder.class:?]
    at gregtech.common.metatileentities.multi.electric.MetaTileEntityMultiFurnace$MultiFurnaceWorkable.findRecipe(MetaTileEntityMultiFurnace.java:165) [MetaTileEntityMultiFurnace$MultiFurnaceWorkable.class:?]
    at gregtech.common.metatileentities.multi.electric.MetaTileEntityMultiFurnace$MultiFurnaceWorkable.trySearchNewRecipe(MetaTileEntityMultiFurnace.java:119) [MetaTileEntityMultiFurnace$MultiFurnaceWorkable.class:?]
    at gregtech.api.capability.impl.AbstractRecipeLogic.update(AbstractRecipeLogic.java:109) [AbstractRecipeLogic.class:?]
    at gregtech.api.capability.impl.MultiblockRecipeLogic.updateWorkable(MultiblockRecipeLogic.java:21) [MultiblockRecipeLogic.class:?]
    at gregtech.api.metatileentity.multiblock.RecipeMapMultiblockController.updateFormedValid(RecipeMapMultiblockController.java:92) [RecipeMapMultiblockController.class:?]
    at gregtech.api.metatileentity.multiblock.MultiblockControllerBase.update(MultiblockControllerBase.java:54) [MultiblockControllerBase.class:?]
    at gregtech.api.metatileentity.MetaTileEntityHolder.func_73660_a(MetaTileEntityHolder.java:152) [MetaTileEntityHolder.class:?]
    at net.minecraft.world.World.func_72939_s(World.java:1835) [amu.class:?]
    at net.minecraft.world.WorldServer.func_72939_s(WorldServer.java:613) [oo.class:?]
    at net.minecraft.server.MinecraftServer.func_71190_q(MinecraftServer.java:767) [MinecraftServer.class:?]
    at net.minecraft.server.dedicated.DedicatedServer.func_71190_q(DedicatedServer.java:397) [nz.class:?]
    at net.minecraft.server.MinecraftServer.func_71217_p(MinecraftServer.java:668) [MinecraftServer.class:?]
    at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:526) [MinecraftServer.class:?]
    at java.lang.Thread.run(Unknown Source) [?:1.8.0_191]