Unhandled Error!

Trying to get property of non-object

Document	Product 2021
Document type	CMS page
Line	5
Exception class	Cms_ExecutionException

Code Highlight

<div class="row">
    <div class="twelve columns">
        <div class="cat-breadcrumbs pt4">
            <span><a href="/">Home</a></span>
            <?php if ($product->category_list): ?>
                <span> &nbsp;>&nbsp;<a href="<?= rtrim($product->category_list[0]->page_url('/category'), '/') ?>/"><?= h($product->category_list[0]->name) ?></a></span>
            <?php endif; ?>
            <span> &nbsp;>&nbsp;<?php echo $product->name; ?></span>
        </div>
    </div>
</div>
 
<section class="content">

#	Document	Type
1	Product 2021	CMS page