artifact with braze crashes game

‘creatures adjacent to your creature gain the abilities granted by its artifact’ - if it did work, it would cause a chain reaction that would lead to lots of trait sharing, so might have to be reworked or impossible to put on an artifact


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

trying to index a variable which is not an array
at gml_Script_bc_StartupEffects
############################################################################################

stack frame is
gml_Script_bc_StartupEffects (line 0)
gml_Object_obj_battlecontroller_Step_0