You mod does a change to the anvil and so does apotheosis. Apotheosis has a less invasive one. The creator of apotheosis says this is an issue on goblin traders side. Could you please fix
https://gist.github.com/celsiusqc/3f8bde8b36cf7c52cf41475e0ba95305

Literally already been fixed and patch released. I would disagree with invasive, I inject code without replacing. Apotheosis changes getMaxLevel and redirects it to it's own function. I was targeting getMaxLevel and injecting code before it. Game crashed because getMaxLevel doesn't exist since Apotheosis replaced it with it's own method ¯_(ツ)_/¯