Script for making groups without friendly fire but doesn't work?

****This is a local script in a GUI on a filtering enabled game, I'm designing it for creating groups in which players can make so they don't accidentally kill each other, this script looks perfect to me and has no output errors, however, the ObjectValue is never created when I look.

function group()
    if script.Parent.crgroup.Text == "Create Group" then
        script.Parent.crgroup.text = "Disband Group"
        grouper = Instance.new("ObjectValue")
        grouper.Parent = game.Players.LocalPlayer
        grouper.Name = "GroupLeader"
        script.Parent.Invite.Visible = true
        script.Parent.NameInvite.Visible = true
    else
        local findgroup = game.Players.LocalPlayer:FindFirstChild("GroupLeader")
        if findgroup then
            findgroup:Destroy()
        end
    end
end

function inviteplayer()
    for i,v in ipairs(game.Players:GetChildren()) do
        if v.Name == script.Parent.NameInvite.Text then
            --to be continued
        end
    end
end

script.Parent.crgroup.MouseButton1Click:connect(group)
script.Parent.Invite.MouseButton1Click:connect(inviteplayer)

By the way, I am not good at scripting but have a semi general understanding.