[1.12.2] Game crashes when launching with the minecraft launcher but not in eclipse

[MCrafterzz]

So when the mod has been build and is run it crashes. Crash log:

https://pastebin.com/vCXW8MR2

 

This is the only mod installed (I do not use oftifine which seems to be a common reason to this crash)

 

Here is my ColourManager class:

@EventBusSubscriber(modid = "ml")
public class ColourManager {
	
	@SubscribeEvent
	public static void registerBlockColourHandlers(final ColorHandlerEvent.Block event) {
		final BlockColors blockColors = event.getBlockColors();

		final IBlockColor grassColourHandler = (state, blockAccess, pos, tintIndex) -> {
			if (blockAccess != null && pos != null) {
				return BiomeColorHelper.getGrassColorAtPos(blockAccess, pos);
			}

			return ColorizerGrass.getGrassColor(0.5D, 1.0D);
		};

		blockColors.registerBlockColorHandler(grassColourHandler, BlockInit.blocks.get(2));
	}

	@SubscribeEvent
	public static void registerItemColourHandlers(final ColorHandlerEvent.Item event) {
		final BlockColors blockColors = event.getBlockColors();
		final ItemColors itemColors = event.getItemColors();

		final IItemColor itemBlockColourHandler = (stack, tintIndex) -> {
			@SuppressWarnings("deprecation")
			final IBlockState state = ((ItemBlock) stack.getItem()).getBlock().getStateFromMeta(stack.getMetadata());
			return blockColors.colorMultiplier(state, null, null, tintIndex);
		};

		itemColors.registerItemColorHandler(itemBlockColourHandler, BlockInit.blocks.get(2));
	}

}

I really don't understand why it crashes when it doesn't when run in eclipse.

[Matryoshika]

Have you tried running a server-instance in Eclipse?

By default, annotated event-handlers are registered on both the Server & Client side, but this code deals with Client-Side only code.
You need to add value=Side.CLIENT to the annotation to make sure that this EventHandler is only run on the client.

Oh, and you shouldn't acronym your modid. What if someone else makes a mod called "magic lore" etc and decide to shorten their modid as well... It won't look pretty, is all I'll say.

[Draco18s]

2 hours ago, Matryoshika said:

What if someone else makes a mod called "magic lore" etc and decide to shorten their modid as well... It won't look pretty, is all I'll say.

And this is why I thought there was a 3 character minimum, but I've already had that conversation with Lex.