Run or Compilation Error on iOS

Hi all!

I’m starting to test iOS programming in xojo. So,I wanna test with a simple example.

A simple label and press button. When the press button is clicked, lable.text = “Hello World”

When I click the “Run” button, it says this "Compilation of “TEST-PROJECT” failed.
An error occurred when attempting to launch the application.

So the same happens when I press the “Build” button

Is something wrong,or I missing something?

I think not :(, I gonna Try it