Probably some typo somewhere in the code...

Logging:
[19:11:31] [main/WARN] [FML]: **************************************** [19:11:31] [main/WARN] [FML]: * A broken ore dictionary registration with name ingotInfuscolium has occurred. It adds an item (type: class it.hurts.metallurgy_5.item.ItemOre) which is currently unknown to the game registry. This dictionary item can only support a single value when registered with ores like this, and NO I am not going to turn this spam off. Just register your ore dictionary entries after the GameRegistry. TO USERS: YES this is a BUG in the mod Metallurgy 5 report it to them! [19:11:31] [main/WARN] [FML]: * at net.minecraftforge.oredict.OreDictionary.registerOreImpl(OreDictionary.java:674) [19:11:31] [main/WARN] [FML]: * at net.minecraftforge.oredict.OreDictionary.registerOre(OreDictionary.java:646) [19:11:31] [main/WARN] [FML]: * at net.minecraftforge.oredict.OreDictionary.registerOre(OreDictionary.java:644) [19:11:31] [main/WARN] [FML]: * at it.hurts.metallurgy_5.item.ItemOre.initOreDict(ItemOre.java:17) [19:11:31] [main/WARN] [FML]: * at it.hurts.metallurgy_5.util.ModRecipes.init(ModRecipes.java:42) [19:11:31] [main/WARN] [FML]: * at it.hurts.metallurgy_5.Metallurgy_5.init(Metallurgy_5.java:98)... [19:11:31] [main/WARN] [FML]: ****************************************

[19:11:30] [main/ERROR] [FML]: Parsing error loading recipe m5:infuscolium_ingot com.google.gson.JsonSyntaxException: Unknown item 'm5:infuscolium_ingot' at net.minecraftforge.common.crafting.CraftingHelper.getItemStack(CraftingHelper.java:212) ~[CraftingHelper.class:?] at net.minecraftforge.oredict.ShapelessOreRecipe.factory(ShapelessOreRecipe.java:166) ~[ShapelessOreRecipe.class:?] at net.minecraftforge.common.crafting.CraftingHelper.getRecipe(CraftingHelper.java:409) ~[CraftingHelper.class:?] at net.minecraftforge.common.crafting.CraftingHelper.lambda$loadRecipes$22(CraftingHelper.java:711) ~[CraftingHelper.class:?] at net.minecraftforge.common.crafting.CraftingHelper.findFiles(CraftingHelper.java:822) ~[CraftingHelper.class:?] at net.minecraftforge.common.crafting.CraftingHelper.loadRecipes(CraftingHelper.java:668) ~[CraftingHelper.class:?] at java.util.ArrayList.forEach(ArrayList.java:1257) [?:1.8.0_172] at net.minecraftforge.common.crafting.CraftingHelper.loadRecipes(CraftingHelper.java:620) [CraftingHelper.class:?] at net.minecraftforge.fml.common.Loader.initializeMods(Loader.java:742) [Loader.class:?] at net.minecraftforge.fml.client.FMLClientHandler.finishMinecraftLoading(FMLClientHandler.java:336) [FMLClientHandler.class:?] at net.minecraft.client.Minecraft.init(Minecraft.java:581) [Minecraft.class:?] at net.minecraft.client.Minecraft.run(Minecraft.java:421) [Minecraft.class:?] at net.minecraft.client.main.Main.main(Main.java:118) [Main.class:?] at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[?:1.8.0_172] at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) ~[?:1.8.0_172] at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[?:1.8.0_172] at java.lang.reflect.Method.invoke(Method.java:498) ~[?:1.8.0_172] at net.minecraft.launchwrapper.Launch.launch(Launch.java:135) [launchwrapper-1.12.jar:?] at net.minecraft.launchwrapper.Launch.main(Launch.java:28) [launchwrapper-1.12.jar:?] at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[?:1.8.0_172] at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) ~[?:1.8.0_172] at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[?:1.8.0_172] at java.lang.reflect.Method.invoke(Method.java:498) ~[?:1.8.0_172] at net.minecraftforge.gradle.GradleStartCommon.launch(GradleStartCommon.java:97) [start/:?] at GradleStart.main(GradleStart.java:25) [start/:?]

Caused by infuscolium ingot