attempt to index nil with 'enabled' error?

Hi. im trying to make a script that temporarily disables your chat. This is my code. it is a local script, and the parent of the local script is Player Gui.

x = script.Parent:FindFirstChild("Chat")
wait()
while true do
    if game.Workspace.Current.Value ~= script.Parent.Parent.TeamColor then
        x.Enabled = false
    else
        x.Enabled = true
    end
end