Cannot open installation node

Hi
I try to create this URcap for installation page, but this error occurs. I figured out to fix on my own but still can’t resolve the problem.
Another thing is in command prompt when running polyscope, these messages come out.

If you guys know the cause please let me know.

Did you make sure all of the bold id’s below match in the Java and the HTML.?

@Input (id = “notUseDummy”)
InputTextField thisNotUseDummy;

@Input (id = “notUseDummy”)
public void onThisNotUseDummyChange(InputEvent event){
If(event.getEventType() == InputEvent.EventType.ON_CHANGE){
//Code
}
}

for HTML:
<input type= “number” id = “notUseDummy”/

Hi ksladky

I’m quite sure that the two input id matches.