JXA Select value from popup menu

Questions & Suggestions
1

I saw in this post that I could select the value from a popup menu like this:

myButton.click();
delay(1);
myButton.menus[0].menuItems.byName(value).click();

However, in my case I get the following error Error -1719: Invalid Index. It happens after the button is clicked, I can see that the menu is opened but it fails to get the menuItems.
Here is my full code

const SystemEvents = Application('System Events');
const app = SystemEvents.processes.byName(appName);


const uiElements = app
  .windows[0]
  .groups[0]
  .groups[0]
  .scrollAreas[0]
  .uiElements[0]
  .groups[5]
  .uiElements;

const value = "One more"

for (const key in uiElements) {
  if (uiElements[key].class() === 'popUpButton') {
    const myButton = uiElements[key]
  	myButton.click();
	delay(2);
	myButton.menus[0].menuItems.byName(value).click();
  }
}
2

What is the application that you are targeting ?

3

it's an internal application from my work, unfortunately it's not accessible

4

Hard to test without seeing the application, but the first thing that comes to mind is that reference by name is case-sensitive, so I wonder whether the menu item is actually "One more" or "One More"

What menu names (if any) are returned, in your context there, by an expression like:

myButton.menus[0].menuItems.name().join("\n")

?

5 
myButton.menus[0].menuItems.name().join("\n")

gives me: Error -1719: Index non valide.
I also tried with

myButton.menus.menuItems.name().join("\n")

which returns undefined

6

So it doesn't look as if there is, in fact, any menu collection or array associated with that myButton reference.