Windows 8 Unhandled exception at 0x59E273B3

Unhandled exception at 0x59E273B3 (msvcr110d.dll) in MonkeyGame.exe:
An invalid parameter was passed to a function that considers invalid parameters fatal.

Strict

Import mojo

Function Main:Int()
	New Game
	Return 0
End

Class Game Extends App
	Method OnCreate:Int()
		SetUpdateRate(60)
		Return 0
	End

	Method OnUpdate:Int()
		If KeyHit(KEY_ESCAPE)
			OnBack()
		End
		Return 0
	End
	
	Method OnRender:Int()
		Cls
		DrawText "HELLO WIN8", 100, 100
		Return 0
	End
	
	Method OnBack:Int()
		Error ""
		Return 0
	End
End