Tree topic: StackBlitz button click error

[ddaribo]

In the tree topic , clicking the StackBlitz buttons of both demos results in the following error and the sampled do not open in SB:

igniteui-theming-widget.js?t=1684919968277:2 Uncaught TypeError: Cannot read properties of undefined (reading 'push')
    at e.createButtonForm (main.c8ac5562ee761ce5ca02.js:1:13069)
    at main.c8ac5562ee761ce5ca02.js:1:12929
    at HTMLButtonElement.<anonymous> (main.c8ac5562ee761ce5ca02.js:1:27736)
    at HTMLButtonElement.dispatch (jquery-3.1.0.js:5110:27)
    at elemData.handle (jquery-3.1.0.js:4918:28)
    at l.invokeTask (igniteui-theming-widget.js?t=1684919968277:2:7240)
    at i.runTask (igniteui-theming-widget.js?t=1684919968277:2:2649)
    at u.invokeTask [as invoke] (igniteui-theming-widget.js?t=1684919968277:2:8290)
    at p (igniteui-theming-widget.js?t=1684919968277:2:20573)
    at HTMLButtonElement.f (igniteui-theming-widget.js?t=1684919968277:2:20818)