CrossFixes

CrossFixes is a client-side Minecraft Forge mod for 1.20.1 that patches critical crashes caused by bugs in third-party mods.
It uses the Mixin system to inject fixes at runtime without modifying or replacing the original mod JARs.

Purpose

Some popular mods ship with null-pointer bugs that can crash your game under certain conditions — loading a GUI before the world is ready, or interacting with a broken multiblock structure.
CrossFixes silently intercepts these crash points and returns safe fallback values instead of letting the game throw a NullPointerException.

Fixes

GeckoLib 4.8.3+

Crashes the client when any animated item is rendered in a GUI (e.g. FancyMenu) before a world is loaded.

MagiChem 0.5.1+

Crashes when right-clicking a Mirror Labyrinth Router whose multiblock structure is broken or incomplete.

Requirements

Dependency	Version
Minecraft	1.20.1
Forge	47.4.18+

Each fix is only active if the corresponding mod is present. CrossFixes does nothing if neither of the affected mods is installed.

Installation

Download the latest CrossFixes JAR from the Files tab.
Place it in your mods/ folder alongside the affected mods.
Launch the game — no configuration required.

Compatibility

Side: Client-side only (safe to use on servers without requiring all clients to have it).
Other mods: CrossFixes does not touch any gameplay mechanics and is compatible with any modpack that includes GeckoLib or MagiChem.