Hey @Hannah, there’s one thing with this demo that is not working (and I guess that’s what @Brandon2 is seeing too). The problem is that Row IDs is often not yet assigned to the row when you’re performing the action, so OpenWindow will not open that popup. Even in your demo, clicking the button adds a row but opens a different one (in embedplay mode Row IDs are not assigned at all).
I’m describing this behavior and offering an updated trick here:
P.S. Even simpler, instead of figuring out whether to use Row ID / UID (because sometimes you’d need one over the other), just get that from thisRow.Url().Split("/_r").Last()