[XML] Getting an error when units are killed "error in unitKilled event handler"

[arcvoodal]

I am using the Neoteric-world mod and am getting the error:

Error in unitKilled event handler <bound method BugEventManager.onUnitKilled of <BugEventManager.BugEventManager instance at 0x0467f698>

This error is spammed for every unit killed anywhere in the game. Does anyone know what causes this?