Second error, after Monique, uh, "questions" the MC. This one makes the game unplayable beyond it because unlike Sam this is required. Here's the traceback.
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ERROR in
action number 1
of Step Event0
for object obj_sceneParent:
Pop :: Execution Error - Variable set failed active - read only variable?
at gml_Script_scr_sceneHide
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gml_Script_scr_sceneHide (line -1)
gml_Script_scr_eventProcessing (line -1)
gml_Object_obj_sceneParent_Step_0
gml_Object_obj_eventGuard1_Step_0 (line -1)