Bug at Realm 2

Until a fight this error pops up and it crashes.

I was at Realm Depth 5, battling some Monsters. Im not fully sure what happened, but I think an Phase Warrior (Not sure about the name, the Blue Armor with Sword and Shield) did something. It was on 0.01.


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

Unable to find any instance for object index ‘128858’ name ‘’
at gml_Script_bc_ExecuteEvents
############################################################################################

stack frame is
gml_Script_bc_ExecuteEvents (line -1)
gml_Object_obj_battlecontroller_Step_0