public static void ShowInvitationPanel()
    {
        PanelMgr mgr = NavigationUtil.PanelMgr;

        if (mgr != null)
        {
            Debug.Log("Showing Invitation Panel!");
            mgr.OpenInvitationPanel();
        }
        else
        {
            Debug.Log("PanelMgr script Missing");
        }
    }