I am getting error messages for a series of buttons (eg delete, add new, publish etc). The message is as follows: Notice : Undefined index: group in /var/www/vhosts/xxx.com/templates/shaper_helixultimate/html/layouts/joomla/toolbar/standard.php on line 18

Is there a way to fix this or is it safe to ignore? The error message only appears when I set errors to "Maximum"

Thanks in advance