Doesn't work on a forge server (crash)

I think it's actually in the obsidian animator api, but there's no issues tracker specifically for that?

https://pastebin.com/6NjyqKp1

My mistake
I was using:
ObsidianAnimator_v1.0.0.jar (listed for 1.12 but working on 1.12.2 single player)
now I am using
ObsidianAPI-1.0.0.jar (listed for 1.12.1 but working for my 1.12.2 server)