I have a custom modpack, and it runs well with:

majrusz-library-forge-1.20.1-7.0.5.jar
majruszs-difficulty-forge-1.20.1-1.9.9.jar

but it crashes on starting loading screen when I update to the latest (I made sure to remove config files and make a clean install to no avail):

majrusz-library-forge-1.20.1-7.0.7.jar
majruszs-difficulty-forge-1.20.1-1.9.10.jar

The game runs fine when I remove these two files, so I am sure it is from this mod.

Minecraft Forge 1.20.1 - 47.2.20

Here are logs:

crash-2024-04-28_13.52.51-client.txt
latest.log