How come my overhead UI stopped working?

I have a overhead ui and it worked a couple hours ago but it wont now what's the problem?

local GroupID = 11777382

game.Players.PlayerAdded:Connect(function(Player)
    Player.CharacterAdded:Connect(function(Character)
        warn("Character Was Added")
        local roleID = Player:GetRankInGroup(GroupID)
        local PlayerRank = Player:GetRoleInGroup(GroupID)
        --// GUI OBJECTS
        local OverheadClone = script.Overhead:Clone();
        local RankFrame = OverheadClone.Frame

        local playerHead = Character:WaitForChild("Head")


        if roleID > 0 then
            OverheadClone.Parent = playerHead
            RankFrame.Rank.Text = PlayerRank
            RankFrame.Username.Text = Player.Name
        end
    end)
end)