CombatTagInstakill throwing errors

[tara81]

2:44:03 PM
CONSOLE:
ERROR]: Could not pass event EntityDamageByEntityEvent to CombatTagInstakill v1.0.0
2:44:03 PM
CONSOLE:
java.lang.NoSuchMethodError: org.bukkit.entity.Projectile.getShooter()Lorg/bukkit/entity/LivingEntity;
2:44:03 PM
CONSOLE:
Source) ~[?:?]