Heya!

AdditionalEntityAttributes recently updated to add a new attribute and fix a few oversights of the past (my bad!)
In one breaking change, the CRITICAL_BONUS_DAMAGE is not added for all LivingEntities anymore, but only to players (Since only players usually deal crits while jumping).
ZenithAttribs always assumed the attribute would be present for all entities (a fair assumption!), this results in a crash with the newest version of AEA.

The issue in the AEA repo has the full info

Ah, thanks. Fixed it in 0.2.0