Bug Description

honestly I just play with 5.21.0 at this moment (I have absolutly no idea of what's the problem)
I just launch with any of the version who's above 5.21.0 and it crash on start (with not enough crash there is no report or anything)

Reproduction Steps

just launch the game and it crash

Log File

https://mclo.gs/O6XxMjM (logs)

list.txt (list of mods i use)

The error in this log appears to be unrelated to ModernFix.

[15:04:08] [Render thread/FATAL]: Error during pre-loading phase
net.minecraftforge.fml.ModLoadingException: Mod File better-boat-movement-2.2.6-1.20.1+forge.jar needs language provider klf:1 or above to load
�7We have found none

You probably need https://modrinth.com/mod/kotlin-lang-forge.