what do i do I was at the dragon and was done and this message popped up every time i try and load that save file what do i do?!?!

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ERROR in

action number 1

of Draw Event

for object obj_game:

DoAdd :2: undefined value

at gml_Script_scr_map_draw_ui

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gml_Script_scr_map_draw_ui (line -1)

gml_Object_obj_game_Draw_0

gml_Script_scr_draw_gui (line -1)

gml_Object_sys_game_Draw_64