Steps to Reproduce the Crash

1. Starting the game

Mod Pack URL (Optional)

No response

Mod Pack Version (Optional)

1.21.1

Extra Notes (Optional)

When I use Useful Backpacks with JEI, the game crashes even before the client starts.

Crash Report

https://gist.github.com/ezevillegasok/e610d45ffcaac88255c40dc4160578c3

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