Jujutsu Craft Index Fix

This Mod was made to fix the Index out of Bound Multiplayer bug

2.2K Downloads

forgegame-mechanicsmanagementutility

Rent Server with this Mod

About this Mod

Jujutsu Craft Index Fix

(Every Server is allowed to use this mod!)

Jujutsu Craft Index Fix is a server side Forge mod created specifically for the Jujutsu Limitless RPG Minecraft server (https://discord.gg/Mr8YnQbHCK). It fixes a known networking issue where clients running the JujutsuCraft mod send an invalid difficulty packet during login, which can cause players to be disconnected.

This mod fixes the annoying bug where you need RNG to be able to connect to your server when other players are online and playing

Available Versions

Jujutsu Craft Index Fix(Working) 1.0.2release

MC 1.20.1, 1.20.2, 1.20.3, 1.20.4, 1.20.5, 1.20.6forge

December 24, 2025

How to Install Jujutsu Craft Index Fix on Your Server

Order Server

Order a Minecraft Java server with at least 3 GB RAM (4 GB recommended).

Set forge Loader

In the panel under "Egg", select the forge loader and matching Minecraft version (1.20.6).

Install Mod

Open the mod browser in the dashboard and search for "Jujutsu Craft Index Fix". Click "Install" – done! Alternatively, upload the .jar via SFTP to the /mods folder.

Compatibility

Mod Loaders

forge

Minecraft Versions

1.20.6, 1.20.5, 1.20.4 (+3 more)

Server-side

✓ Required

Recommended RAM

4 GB(min. 3 GB)

Frequently Asked Questions

Jujutsu Craft Index Fix server crashes on startup – what to do?

Most common cause: wrong forge version or insufficient RAM. Check the server log (latest.log) for "OutOfMemoryError" or "Mixin" errors. With Mado Hosting: ensure at least 3 GB RAM is allocated and the loader matches the mod version (1.20.6). You can switch loaders with one click in the panel.

Is Jujutsu Craft Index Fix compatible with forge?

Jujutsu Craft Index Fix officially supports forge for Minecraft 1.20.6, 1.20.5, 1.20.4. The Mado dashboard automatically detects incompatible loader combinations.

Server lagging with Jujutsu Craft Index Fix – how to optimize performance?

Recommended RAM: 4 GB (per 8 players). Use /spark profiler to check if Jujutsu Craft Index Fix consumes the most tick time. Common fixes: reduce server view-distance to 8-10, install "performant" or "starlight" as supplementary mods on Forge. With Mado Hosting, your server runs on NVMe SSDs with dedicated CPU cores for minimal latency.