I might be missing something here. My modpack crashes when loading any world, and on another instance with just the most recent version of setbonus and Fantastic Lib, I could recreate the crash after adding a new set bonus.

Crash Log: https://mclo.gs/nOcaE2a

It seems to be related to set requirements not being found, but I might be wrong

Ah...I think I recognize this. Should be a quick fix if so

This should now be fixed in latest release (1.12.2.037)
Let me know if you continue running into issues / run into new issues

nice one.

I'll let you know if I find anything.