After Effects 2023 - ExtendScript UI Bug

Hello,

Would love help with this Adobe AE 2023 bug!

Problem:

I'm attempting to use Adobe's code here (under "Custom layout-manager example").

This code builds a window with a button that has a custom location in the UI.

Example here:

But when I run Adobe's code example in After Effects 2023, it crashes.

Parts of code that crashes:

// of "container" in a stair-step fashion.
function StairStepButtonLayout( container ) {
    this.initSelf( container );
}

win.buttons.layout = new StairStepButtonLayout( win.buttons );

Question:

How could I solve this crashing issue?

Thank you very much!