I can tell this has been asked a lot, and yes before you tell me I did look at the common problems and issues section but it didnt help.

 

FYI: This is my first mod, so I am just following a tutorial.

 

I am trying to register my item, yet whenever I run the game it crashes on the 2/7 stage.

public class CustomItems 
{
	public static Item CustomItem;
	
	public static void preInit()
	{
		CustomItem = new Item().setUnlocalizedName("custom_item").setCreativeTab(CircleMod.extraTab);
		registerItems();
	}
	
	public static void registerItems() 
	{
		ForgeRegistries.ITEMS.register(CustomItem);
	}
	
	public static void registerRenders() 
	{
		registerRender(CustomItem);
	}
	
	public static void registerRender(Item item) 
	{
		Minecraft.getMinecraft().getRenderItem().getItemModelMesher().register(item, 0, new ModelResourceLocation(CircleMod.MODID + ":" + item.getUnlocalizedName().substring(5), "inventory"));
	}
}

That is roughly what the tutorial say to use, although it has minor tweaks because the tutorial is for 1.10 and i'm in 1.12.

I get the error: 

Can't use a null-name for the registry, object net.minecraft.item.Item@166fa7ab.

I did a fair amount of research into it but I couldn't find anything that would help.

My full log: https://pastebin.com/0jifnRW9

 

I hope this isn't "spam"!

Thanks in advance,

Dream.

Thanks for the reply I will make the changes needed!

Dream.