Unhandled Error!

Trying to get property of non-object

Document shop:product
Document type CMS partial
Line 810
Exception class Cms_ExecutionException

Code Highlight

 
        </div><!-- /.row -->
    </div><!-- /.container -->
 
    <meta itemprop="description" content="<?= $product->x_schema_description ? $product->x_schema_description : $product->short_description; ?>" />
    <meta itemprop="url" content="<?= root_url($product->page_url('product'),true); ?>" />
    <meta itemprop="category" content="<?= $product->categories[0]->name; ?>" />
    <meta itemprop="sku" content="<?= $sku; ?>" />
    <? if($product->manufacturer): ?>
        <meta itemprop="brand" content="<?= $product->manufacturer->name; ?>" />
    <? endif; ?>
 
</div><!-- /.product -->
# Document Type
2 shop:product CMS partial
1 Large Capacity Rucksack Backpack CMS page