Describe the bug
The game crashes when opening the Iron Chisel GUI from Chisels And Bits.
Looks like a cross interaction with Fancy Menu & Chisels And Bits. Might also be tied to the fact I've customized the Game Menu ingame. (the escape menu where you go into the options etc.)

To Reproduce
Steps to reproduce the behavior:

1. Have FancyMenu installed.
2. Have Chisels And Bits installed.
   2.5 Customize the ingame pause menu. (might be tied to the issue)
3. Grab an Iron Chisel
4. Open the Iron Chisel GUI.
5. Crash.

Expected behavior
Game not crashing when opening the Chisel GUI from Chisels And Bits.

Crash Log
https://pastebin.com/7kf8DciT

Basic Informations:

• OS: Windows
• FancyMenu Version 2.0.3
• Forge Version 36.0.58
• Minecraft Version 1.16.5
• Active Mods
  https://www.curseforge.com/minecraft/modpacks/tnp-limitless-3/files/3239322 (Scroll down)

Fixed in FancyMenu v2.0.4! Thank you for your report!