0.12.1 - Windows - Animation Creature Crash

When entering into a battle in the Astral Gallery, the event that spawns 6 Animation race creatures, I received the following crash:


############################################################################################
ERROR in
action number 1
of Step Event0
for object obj_battlecontroller:

trying to index variable that is not an array############################################################################################
gml_Script_bc_GetAdjacentCreatures (line 175)
gml_Script_scr_CritIsImmune (line 200)
gml_Script_scr_CritAddCondition (line 49)
gml_Script_bc_StartupBuffsDebuffs (line 311)
gml_Object_obj_battlecontroller_Step_0 (line 539)

The enemy team is depicted below, and as I’d already encountered this event with a different group of animations, I think it might have something to do with either the ear or the brain animation, as this was the first time I’d seen those varieties specifically.
animation_bug

Edit: This might have been the Creature Master fight, I’m not sure, sorry T.T