Unhandled Error!

Invalid argument supplied for foreach()

Document	inner
Document type	CMS template
Line	19
Exception class	Cms_ExecutionException

Code Highlight

  <div class="container">
  <div class="row-fluid box content-outer">
    	<div class="box content-inner">
    	<?php 
    	$category = isset($category) ? $category : '';
    	if($category) { ?>
           <? foreach ($category->images as $image): ?>
<img src="<?= $image->getThumbnailPath(100, 100) ?>" class="left" style="margin-right: 15px;"/>
<? endforeach ?>
<?php } ?>
           <? $this->render_partial('layout:title') ?>
    		<? $this->render_page() ?>
    	</div>

#	Document	Type
1	inner	CMS template