Modern Ragnarok Kuroutils Fix

⚠️ Maintenance Notice

Due to personal circumstances, I have reluctantly had to step away from the development and maintenance of this mod.

As a result, this mod is no longer actively maintained. Updates, bug fixes, compatibility patches, and further development are suspended for an indefinite period — possibly permanently.

This is not a decision I wanted to make, and I am genuinely sorry to leave the project in this state. The mod will remain available for download, but compatibility with future Minecraft versions, loaders, or dependencies cannot be guaranteed.

Thank you to everyone who has downloaded. ❤️

⚒️ Modern Ragnarok Kuroutils Fix

Small NeoForge compatibility patch for a startup crash affecting Modern Ragnarok Zero

⚠️ This is NOT the original Apotheosis: Modern Ragnarok Zero mod.

This project is an unofficial compatibility patch designed to fix a specific startup crash affecting some Minecraft 1.21.1 NeoForge installations.

❤️ Credits

This project is an unofficial compatibility patch for:

Apotheosis: Modern Ragnarok Zero

Created by ChloePrime (Kurouma Akemi).

If you are looking for the original mod, please support the author and download it here : https://www.curseforge.com/minecraft/mc-mods/apotheosis-modern-ragnarok

This patch is not affiliated with, endorsed by, or maintained by the original author. It only addresses a specific startup crash involving Kuro Utils registry serializer baking on Minecraft 1.21.1.

❌ The Problem

Some heavily modded environments may crash during startup while Kuro Utils is baking RPC serializers.

The crash usually looks like:

```text
java.lang.NullPointerException:
Cannot invoke "net.minecraft.core.Holder$Reference.value()"
because "this.defaultValue" is null

at cn.chloeprime.commons_impl.rpc.serialization.RpcSerializers.bakeSerializersForRegistries

Modern Ragnarok Zero embeds Kuro Utils, meaning the issue can appear even if Kuro Utils is not installed separately.

✅ What This Patch Does

Fixes the specific startup crash caused by missing registry default values. Allows the game to continue loading normally. Adds no gameplay content. Adds no commands. Adds no configuration. Lightweight compatibility patch.

🔍 Known Environment

The issue was originally encountered in a large NeoForge modpack containing:

Modern Ragnarok Zero Create Many additional mods

Create was present when the crash occurred, but there is currently no evidence that Create itself is responsible.

📦 Installation

Download the latest release. Place the jar inside your mods folder. Launch Minecraft normally.

⚠️ When Will This Help?

This patch is intended for crash reports mentioning:

RpcSerializers.bakeSerializersForRegistries

or

defaultValue is null

If your crash report does not contain these messages, this patch is unlikely to solve your issue.

❓ Why Does This Mod Exist?

This patch was created after encountering the issue in a personal modpack and tracing the crash back to Kuro Utils’ registry serializer baking process.

Rather than forcing users to remove mods or rebuild their pack, this fix provides a minimal and focused workaround.

📜 License

Licensed under GNU GPL v3.0 Only.