Crash in Battle

Windows Steam-Version 0.0.4
The Game crashed while attacking. Here is the last Screen:

This was an special Enemy in a Portal at Realm 13 where you get 2 Chests.


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

Variable obj_artifact.(100058, -2147483648) not set before reading it.
at gml_Script_bc_GetAlliesOf
############################################################################################

stack frame is
gml_Script_bc_GetAlliesOf (line -1)
gml_Script_scr_CritHasPassive
gml_Script_scr_CritHasCondition
gml_Script_bc_EventBuff
gml_Script_bc_EventBuff
gml_Script_bc_EventBuff
gml_Script_bc_EventBuff
gml_Script_bc_EventBuff
gml_Script_bc_EventBuff
gml_Script_bc_EventBuff
gml_Script_bc_EventBuff
gml_Script_bc_EventBuff
gml_Script_bc_EventBuff
gml_Script_bc_EventBuff
gml_Script_bc_EventBuff
gml_Script_bc_EventBuff
gml_Script_bc_EventBuff
gml_Script_bc_EventBuff
gml_Script_bc_EventBuff
gml_Script_bc_EventBuff
gml_Script_bc_EventBuff
gml_Script_bc_EventBuff
gml_Script_bc_EventBuff
gml_Script_bc_EventBuff
gml_Script_bc_EventBuff
gml_Script_bc_EventBuff
gml_Script_bc_EventBuff
gml_Script_bc_EventBuff
gml_Script_bc_EventBuff
gml_Script_bc_EventBuff
gml_Script_bc_EventBuff
gml_Script_bc_EventBuff
gml_Script_bc_EventBuff
gml_Script_bc_EventBuff
gml_Script_bc_EventBuff
gml_Script_bc_EventBuff
gml_Script_bc_EventBuff
gml_Script_bc_EventBuff
gml_Script_bc_EventBuff
gml_Script_bc_EventBuff
gml_Script_bc_EventBuff
gml_Script_bc_EventBuff
gml_Script_bc_EventBuff
gml_Script_bc_EventBuff
gml_Script_bc_EventBuff
gml_Script_bc_EventBuff
gml_Script_bc_EventBuff
gml_Script_bc_EventBuff
gml_Script_bc_EventBuff
gml_Script_bc_EventBuff
gml_Script_bc_EventBuff
gml_Script_bc_EventBuff
gml_Script_bc_EventBuff
gml_Script_bc_EventBuff
gml_Script_bc_EventBuff
gml_Script_bc_EventBuff
gml_Script_bc_EventBuff
gml_Script_bc_EventBuff
gml_Script_bc_EventBuff
gml_Script_bc_EventBuff
gml_Script_bc_EventBuff
gml_Script_bc_EventBuff
gml_Script_bc_EventBuff
gml_Script_bc_EventBuff
gml_Script_bc_EventBuff
gml_Script_bc_EventBuff
gml_Script_bc_EventBuff
gml_Script_bc_EventBuff
gml_Script_bc_EventBuff
gml_Script_bc_EventBuff
gml_Script_bc_EventBuff
gml_Script_bc_EventBuff
gml_Script_bc_EventBuff
gml_Script_bc_EventBuff
gml_Script_bc_EventBuff
gml_Script_bc_OnAttack
gml_Script_scr_AddEventToStack
gml_Script_bc_CreatureAttack
gml_Script_bc_Turn
gml_Object_obj_battlecontroller_Step_0

Got it, thanks!