0. ALWAYS PROVIDE INFORMATION ABOUT MODLOADER (Fabric / Forge) AND MOD VERSION (For Example 1.19.2-8.2.10)

Using Modrinth Fabric Modpack (Issue is most likely Travelers Backpack though) with mod version 1.21.1-10.1.17

1. Describe the bug

When Trying to Join a Server of my Friends with a bunch of mods, the Game suddenly crashes. Doesnt happen on Singleplayer.

2. Write steps to reproduce the bug

   1. Download modpack (download here: https://limewire.com/d/NH8kA#NtXvTerErV)
   2. Start Up Game
   3. Join a Server (preferrably wearing a Backpack)
   4. The Game Crashes ~3 seconds after joining

3. What is expected behaviour

The Game not Crashing

4. Screenshots (If applicable)

Log: 2025-03-30-7.log

Mine has done the same thing but from what I can see our log errors are different and it is updated on the server. We checked.

We're on Forge 1.20.1-9.1.34.

debug.log
latest.log

Seems like the issue comes from alltheleaks mod, The patch they were applying is no longer needed, probably worth reporting it to them

Okay thanks. I'll let them know.

That's good, the fix for og issue is to update mod on server - there was exactly the same bug report like this before and the issue was version mismatch. Closing this

Just thought I'd let you know the AllTheLeaks dev has patched and pushed an update to CurseForge.

Mod not updated on server