Luis_ST

Why do you not use a IGuiOverlay to draw the line? You can there use GuiGraphics.

You could also checkout ModInfo#getVersion

The error is caused by the worldgen/noise alternate_surface from namespace 'eco'. Eco could be a Mod or a Datapack you are using there are no more infos in the crash-report nor the log.

I personally don't use it in my mods, you can look at the generated class files in run/.mixin.out to see if there is a difference. If they are not overriden in the vanilla chicken then yes

What did you try to achieve?

Try without 'eco'

First of all your Mixin class should be abstract. Sorry, I didn't mention that if the method you want to change is not implemented in the target class, you can just override it like you would without mixin. You should use as few mixins as possible

Please create your own thread.

The registry override seems to be working but vanilla has a problem to use the override instead the default entity the pig is used. Have you tried to use debugger to find the cause why vanilla uses the big instead of your entity?

Why, forge already has an update checker?

A log that contains something that indicates that you are using forge and because of this the game crashes whether forge or a mod is causing the problem does not matter. Because the log you posted contains a crash from multimc and not from forge.

Your MobEffect (CantSwimEffect) is a registry object, you must not create a new instance of it you should use the one your registered.

Problem with Unique Enchantments Base. Make sure you are using the latest version. If the Mod is already up to date, talk to the Mod author.

Please post ful log. The error uses cantSwimEffect but in your code you use CantSwimEffect, make sure this is not the problem.

Please post the debug.log, it could be that you can not override EntityTypes but im not sure.

That's the cause of the problem: you can't check whether the capability is present because you attach the capability there.

I'm sorry, but paste.ee does not support very large files, the file will simply be cut off. Your debug.log does not contain any error that would explain the crash of the game.

Then please do that

In the log you post MultiMC is crashing this is no problem with forge. If you have problems with forge post a related log.

This was your problem if you don't know the difference between string and character. i would recommend learning the basics of java before modding Minecraft,

I have never used SavedData before, is it explicitly required or would it also be possible to use a capability?

Please post debug.log which contains the full error you get.

Please post the updated code (full class) and the error you get

Use FoodProperties.Builder#effect which takes a MobEffectInstance Supplier and the chance of the effect (0.0 - 1.0) I would recommend to follow the java naming convention.

Please create your own thread and post there the debug.log from the logs folder.