Crash message when creating new world. [java]

take these steps to help us diagnose the problem
1. turn on computer
2. unplug everything including power so it crashes
3. start a pig farm
4. sell the pigs you farmed
5. eat grass


or post the full crashlog -.-

what mods are you using? maybe take the specific out. What mod gives you graveyards?

I have just set up a 1.16.5 modpack with curseforge. every time I go to create a world I get an error message and a crash.

The game crashed whilst mouseclicked event handler
Error: java.lang.NoSuchFieldError: GRAVEYARD

I have been looking around for answers but cant find much, is anyone able to give me any advice for what I can do next? I am very new to this so I am not much use with this stuff. https://1921681254.mx/

Thanks in advance :)

I got this,...