When I try to run the game's exe file it gives me this error everytime!

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FATAL ERROR in

action number 1

of Other Event: User Defined 0

for object objLevelEditor:

layer_background_blend argument 2 incorrect type (undefined) expecting a Number (YYGI32)

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called from - gml_Script___background_set_colour (line 9)

called from - gml_Script_level_load (line 142)

called from - gml_Object_objLevelEditor_Other_10 (line 48)

called from - gml_Object_objGame_Other_4 (line 33)