Tested with forge 47.4.0 and 47.4.1
No other mods installed, only Global Packs

Crash on startup, even before main menu loaded

crash-2025-06-03_22.52.06-client.txt

Used latest version of Global Packs 19.3.3

Thanks, seems like I ran into a Mixins bug that I didn't notice, testing some potential fixes, hope the bugfix will be up in 1-2 hours.

Here is the bug that caused this SpongePowered/Mixin#431
It's fixed in 19.3.4 (I tested by hand it, if the automated upload broke it again, I am going to quit modding 😭)

Thanks for quick fix. Works fine now :)