My localscript in startergui ruins all my gui's Help?

Alright, so here's the thing. I wanted to make a GUI that changes "pages". So you can choose a category then it changes to that category.

But, in the beginning everything worked fine with making the first page invisible. Then i added so the "second" page would become visible after you click. But when I click the GUI button in play mode, everything gets invisible excluding the frames.

The script is in a local script inside StarterGUI

script.Parent.MouseButton1Click:Connect(function()
	script.Parent.Visible = false
	print("Changed ChangeCategoryMyth to invisible")
	script.Parent.Parent.ChangeCategoryWIP.Visible = false
	print("Changed ChangeCategoryWIP to invisible")
	game.StarterGui.Garry_Gargoyle.Enabled = true
	print("Changed Garry_Gargoyle.Textbutton to visible")
end)

Everything gets printed. But every GUI in ScriptGUI becomes invisible

Note: I am a beginner in scripting with GUI's.

Screenshots: https://imgur.com/gallery/XfuxOnl