code wont make GUI

So i tried to make an app, using matlab appdesigner,

I made waht i need, before some handy editing, so i wanted to make exactly how it worked before,

I copied the generated code, I made a new file, Ctrl+v, and run, but this time, it wont show an app but an answear (?), and i have no idea why :(

This is what I get when i run it:

No, errors, no warnings, nothing, and it kinda took me off guard. Any app i made before, with same "method" still works to this day, just this one.

Help appreciated, Thank you in advance.

[Walter Roberson]

Try

APP.app1

Note that is a digit 1 not a lower-case L

[Damian Pietron]

This is the result, not working, but, thats an error at least :P