Board Thread:LotR Mod Technical Support/@comment-26210095-20170410025944

Whenever I try to load up my modded Forge account, the game crashed upon opening it. It simply gives me this:

The game crashed whilst there was a severe problem during mod loading that has caused the game to fail

Error: cpw.mods.fml.common.LoaderException: java.lang.NoSuchMethodError: net.minecraft.item.Item$ToolMaterial.setRepairItem(Lnet/minecraft/item/ItemStack;)Lnet/minecraft/item/Item$ToolMaterial;

Any idea what this means / how to fix it? I tried to open the full crash report but it wouldn't let me.

Thanks! 