Hello... I am new to java modding and I still have no idea what I am doing but I figured I would reach out to anybody that is willing to help figure a few issues out.
My wife and I are trying to create a modpack/server with Minecraft version 1.12.2 to play with a few friends and Slug's Class Picker is a perfect mod for what we want to do. Unfortunately, it causes Minecraft to crash when you try to get into the Control's menu. This happens when it is only Forge and Slug's Class Picker but I also have JEI, Optifine, and Vanilla Fix installed.