So I had a script which is inside another frame, let’s call the other frame “Frame1”
The there is a button which is called A, but the A is in another frame which we call “Frame2”
So Frame1 > LocalScript > script.Parent.Parent.Frame.Visible = true
Frame2 > A > Visible
For future support, please provide images when you get these kinds of errors, cause sometimes it helps.
In this case, please provide a screenshot of the “Explorer” tab.
As for the solution, you are probably not grabbing the “A” instance properly.