Legacy4J Version

1.7.1 for 1.20.1

Mod Loader Version

Forge 47.3.0 (1.20.1)

Bug/Glitch Occurrence Context

Attempting to open the game with Legacy4J, Quark, and Zeta (library mod) installed. This was tested with only these three mods installed and up to date.

Crash Report

https://mclo.gs/Fu8GfJ3

What happened wrong?

The game crashes completely after a briefly appearing during startup.

Actually, this is moreso a fault on Quark's end. Both Leagcy4J and Quark will preload all recipes, which conflicts with both mods and result in a crash. There's a fix for this, though. If you modify Quark's config, you can actually get both to load without crashing. Under the Tweaks section in quark-common.toml, there should be a line that says "Automatic Recipe Unlock", change it from true to false. Both mods should now work with each other. You can also do this through Quark's own in-game config.