Unsolved QJSEngine with QUILoader undefined ui childe bject

[Ricardo MAtos]

I,

Im trying to make a plugin loader with QJSEngine,
I can load the ui correctly into the application using the QUiLoader called from the script file, but in the script when i try to access to the childs elements of the ui file, it gives me "undifined" for all of the childs,

What is the correct way to acoplishe that?