Describe the issue
It crashes because FancyMenu is trying to cast blusunrize.immersiveengineering.client.gui.elements.GuiReactiveList to de.keksuccino.fancymenu.customization.overlay.CustomizationOverlayMenuBar. I'm assuming that IE created a screen in an unusual way that breaks the common compat of FancyMenu.

PS: One might need to take a look at more screens from IE as they could be broken in the same manner.

Game Log
Crash report: https://gist.github.com/StockiesLad/e2c81a887f7917bc770bdac80aa9b263
Logs: https://gist.github.com/StockiesLad/c7c1cd23100e10eb42c21dbb628aaf23

Screenshots
If screenshots would help to explain the issue, please include these.

Basic Informations (please complete the following information):

• OS: Win 10
• FancyMenu Version: 3.2.3
• Forge/Fabric Version Forge: 47.3.0
• Minecraft Version: 1.20.1
• Active Mods: In the logs (There are a lot)