I have ran into a problem in the fight.

[cargarn47]

I've been trying to beat the ink sans battle, but there is a problem after i survive the seraphim sans attack. The game crashes and gives me this error:

---

############################################################################################
ERROR in
action number 1
of Step Event0
for object but13:

Push :: Execution Error - Variable Index [1] out of range [1] - 1.(100045,1)
at gml_Object_but13_Step_0
############################################################################################
gml_Object_but13_Step_0 (line -1).

This prevents me from getting any further into the game.