When I set the server error reporting to maximum, I see on my webpages the following:

Notice: Undefined property: YtTemplate::$_tagPG in /home/ahherald/public_html/plugins/system/yt/includes/site/lib/yt_template.php on line 245

When I view yt_template.php I see the following lines.
Line 245 is if(isset($_COOKIE[$this->template.'_direction'])){


// Render menu
function getMenu(){
$menubase = J_TEMPLATEDIR.J_SEPARATOR.'menusys';
include_once $menubase .J_SEPARATOR.'ytloader.php';
if(isset($_COOKIE[$this->template.'_direction'])){
$direction = $_COOKIE[$this->template.'_direction'];
}else{
$direction = $this->getParam('direction');
}

Can you tell me what needs to be fixed?