So basically I've been having a problem where I can't see the coreGUI due to a huge error, and because of that I think I should just make everything myself through scripting, like custom playerlist, chat, etc.
But I have no idea how to hide the main coreGUI, so does anyone here know?
Well, you can hide everything at once by using SetCoreGuiEnabled.
game.StarterGui:SetCoreGuiEnabled(Enum.CoreGuiType.All, false)
You can also replace 'All' with other single things like 'Chat' or 'PlayerList'.
Hope this helped.