I am getting a warning on my blog

I got a message on my current world blog, that is- The Quick Cache plugins have new versions available. Check the ones you want to update and then click “Update Plugins. When I update this plugin, It show a message on footer area-

“Warning: Missing argument 2 for WP_Admin_Bar::add_node(), called in /home/onlin215/public_html/currentworld.net/wp-content/plugins/quick-cache/includes/classes/menu-pages.inc.php on line 242 and defined in /home/onlin215/public_html/currentworld.net/wp-includes/class-wp-admin-bar.php on line 164

Warning: Missing argument 3 for WP_Admin_Bar::add_node(), called in /home/onlin215/public_html/currentworld.net/wp-content/plugins/quick-cache/includes/classes/menu-pages.inc.php on line 242 and defined in /home/onlin215/public_html/currentworld.net/wp-includes/class-wp-admin-bar.php on line 164

Warning: Invalid argument supplied for foreach() in /home/onlin215/public_html/currentworld.net/wp-includes/class-wp-admin-bar.php on line 165″

My blog is http://currentworld.net/. Please help me how to fix this?