Unhandled Error!

Trying to get property of non-object

Document	category
Document type	CMS page
Line	2
Exception class	Cms_ExecutionException

Code Highlight

<section class="content" style="padding:0px;">
	<section class="category <?php echo $category->url_name; ?>">
		<div class="row">
 
			<!--<div class="two columns">
			<? foreach ($category->images as $image): ?>
			<img src="<?= $image->getThumbnailPath(400, 400) ?>"/>
			<? endforeach ?>
			</div>-->
 
			<div class="twelve columns">
 
<div id="category-page">

#	Document	Type
1	category	CMS page