when i try to launch this modpack with a mod called essentials it crashes in a modpack called Greedy Craft is there anyway to fix it
crash-2021-10-16_14.36.23-client.txt

It looks like some other mod is bundling a conflicting version of the Kotlin unsigned types library.

Depending on how the class loader is implemented you may be able to work around it by renaming the librarianlib jar to something like 0-librarianlib-1.12.2-4.22.jar. Basically putting it first in the alphabetical order might make Minecraft look for the class in our jar first.

@thecodewarrior On 1.12.2 you still seem to rely on Kotlin 1.3.0, and we bundle Kotlin 1.5.30. This needs to be fixed on your end by compiling against a newer version, as the unsigned types methods have changed.

How would you do this? i am having this issue in 1.12.2 and i would like to modify the version and solve this problem as i cant find any other reports of this issue.