Frame does not exist? GUI help.

Basically, I have a ClickDetector in a Part, and when you click on it a GUI appears. After 3 seconds, the Frame's background is supposed to fade out, but Studio is trying to tell me a Frame doesn't exist, but it clearly does as a Child of the GUI. Here's my script, am I missing something? Because I have no idea. Everything works up to line 9.

This is the error I get: Frame is not a valid member of ScreenGui. Thank you if you can help.

local blurdialogue = game.Lighting.WindowBlurGUI1
script.Parent.ClickDetector.MouseClick:connect(function(plr)
    print("This window is too blurry to be seen through")
    local blurclone = blurdialogue:Clone()
    blurclone.Parent = plr.PlayerGui
    wait(3) 
    for i = 0, 1, .5 do
        blurclone.Frame.Transparency = i
        wait()
        blurclone:Destroy()
    end 
end)