When I try to make paint in the manor it always show a message and then crashes my game.  Here's the copy of the message:

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ERROR in action number 1

of Other Event: User Defined 2 for object obj_potions:

instance_exists argument 1 incorrect type (unknown) expecting a Number (YYGI32)############################################################################################

gml_Object_obj_potions_Other_12 (line 5)

gml_Object_obj_group_1_Step_0 (line 5)