Some information

Operating system: Win 11 x64
Java version: openjdk 21.0.6 2025-01-21 LTS
Minecraft version: Neoforge 1.21.1 Allthemods10 last ver
Baritone version: the one for neoforge for selfbuilding
Other mods (if used): allthemods 10 last ver modpack

Exception, error or logs

disconnect-2025-02-27_13.14.34-client.txt

How to reproduce

I build the version, then i coppy and try the different neoforge compiled versions and this happens. 1 each time, not all the 3 versions at the same time obv.
This issue occurs only when I have Baritone installed. The server is running All the Mods 10 with NeoForge. I’ve compiled Baritone from the official source for Minecraft version 1.21.1 with NeoForge, and I’ve tried using both the standalone version and the baritone-unoptimized-neoforge-1.11.0 version. Additionally, I’ve also tried using the Baritone API version, but the error persists in all cases. I’ve checked the logs on both the server and client side, but I can’t find any clear explanation for why this is happening. I really need help resolving this issue. Does anyone have any advice or a solution?

Modified settings

Cant load the game.

Final checklist

• I know how to properly use check boxes
• [x ] I have included the version of Minecraft I'm running, baritone's version and forge mods (if used).
• [x ] I have included logs, exceptions and / or steps to reproduce the issue.
• [x ] I have not used any OwO's or UwU's in this issue.

This looks like a known incompatibility with underdarden, which assumes nobody will query the damage value of an ItemStack before a world is loaded, but Minecraft does construct ItemStacks before loading a world and Baritone does query the damage value of those. As far as I know this has been fixed on the undergarden side.

(Aside: "the version for selfbuilding" is not very specific, you should include the commit hash or a permanent link)

So what should I do now?

Update undergarden (on the server as well, if needed for client compatibility).