Unhandled Error!

Trying to get property of non-object

Document	Product Page
Document type	CMS template
Line	9
Exception class	Cms_ExecutionException

Code Highlight

<html xmlns="http://www.w3.org/1999/xhtml">
  <head>    
    <meta http-equiv="content-type" content="text/html; charset=utf-8" />
    <link rel="stylesheet" type="text/css" href="<?= root_url('/resources/css/styles.css') ?>" />
    <link href="<?= root_url('/resources/css/screen.css') ?>" rel="stylesheet" media="screen, projection" type="text/css" />
    <link rel="stylesheet" type="text/css" href="<?= root_url('/resources/css/print.css') ?>" media="print"/>
    <title><?= h($product->manufacturer->name); ?> - <?= h($this->page->title) ?> | Downunder UGG Boots</title>
    <meta name="Description" content="<?= h($this->page->description) ?>"/>
    <meta name="Keywords" content="<?= h($this->page->keywords) ?>"/>
    <meta name="google-site-verification" content="AvNDZ8TmIs71_qxYGbTqZuNz8yciODLhYUW3n2CiCgc" />
 
    <meta property="og:title" content="<?= h($product->manufacturer->name) ?> - <?= h($this->page->title) ?>" />
    <meta property="og:type" content="product" />

#	Document	Type
1	Product Page	CMS template