gui button not expanding on click?

Hi, so I'm editing a friend's game that's created as an Interview Center. There's this button (Screen GUI) that says 'Interview Questions', and when you click on it, it's supposed to expand with the interview questions. However, there's an error and it's not expanding on click. I'm unsure what's causing this and I would like to ask for help. Any feedback / suggestions will be very helpful.

• FE is turned on.
• https://i.imgur.com/IJ7SXw5.png (For reference, if it helps any.)

Check (Under ScreenGUI)

repeat wait() until script.Parent.Parent.Name ~= "StarterGui"
plr = script.Parent.Parent.Parent

if plr:GetRankInGroup(3312565) <8 then
    if plr.Name == "" or plr.Name == "aelzc" or plr.Name == "iiPotato_Queenxx" then
        return
    end
    script.Parent:Destroy()
end

Script (Under Button > Button)

script.Parent.MouseButton1Down:connect(function()
    script.Parent.Parent.Visible = false
    script.Parent.Parent.Parent.Questions.Visible = true
end)

Script (Under Questions > Button)

script.Parent.MouseButton1Down:connect(function()
    script.Parent.Parent.Visible = false
    script.Parent.Parent.Parent.Button.Visible = true
end)