I went to check my server console the other day and it was just spamming a bunch of NullPointerExceptions for onCraftedEvent(). Everything seems to be working fine on the server but this is just annoying since I can't read console.
fml-latest log.txt

I am using sponge 1.10.2 so I'm not sure if this is a sponge problem or a Actually Additions problem.

Try without using Sponge.

I pulled out Sponge and is spams a similar exception.
fml-latest.txt

Try removing other mods and see if the problem persists. If not, try to find out which mod is causing it.

Not sure what I did. I just restarted it to make a copy to test with and I started it back up. It seems to have stopped now. Thanks for your time. I'll put an update if something happens again.

Spoke too soon, it's back. Seems like it's happening with a chunk or something.

Is that without any other mods installed?

No, but I have no idea what player is causing it and what chunk loads that causes the exception to start spamming.

Is there any more info on this? Otherwise, I will close this issue as I cannot reproduce it.