Opening the rom

[crzylemon]

So when i drop in my unmodified Super Mario Bros ROM (Super Mario Bros (E).nes) it crashes with an error.
Error

guipattern.lua:77: attempt to index local 'ptrn' (a nil value)

Traceback

[love "callbacks.lua"]:228: in function 'handler'
guipattern.lua:77: in function 'onUpdate'
guielement.lua:130: in function 'update'
guielement.lua:135: in function 'update'
guielement.lua:135: in function 'update'
gui.lua:545: in function 'updateGUI'
main.lua:466: in function 'update'
[love "callbacks.lua"]:162: in function <[love "callbacks.lua"]:144>
[C]: in function 'xpcall'"

EDIT: same thing happened with my modded version. what is happening??????