Error message after adding category name

-- HikaShop version -- : 2.4.0
-- Joomla version -- : 3.6.3
-- PHP version -- : 5.5.38
-- Browser(s) name and version -- : firefox nightly 52.0a1
-- Error-message(debug-mod must be tuned on) -- : Undefined property: CategoryViewCategory::$row in /home/wwwwhitepepperho/public_html/templates/protostar/html/com_hikashop/category/listing_div.php on
Notice: Trying to get property of non-object in /home/wwwwhitepepperho/public_html/templates/protostar/html/com_hikashop/category/listing_div.php on l

Hello All, I recently added a custom div to the Hikashop cateegory page. The div drops down over the top of the category image and contains a logo, category name and button. To allow the title to display I added the following : <?php echo $this->escape($this->row->category_name); ?> which works on all of the divs except the first one. The first one produces two errors, the first error is Undefined property: CategoryViewCategory::$row and the second is Notice: Trying to get property of non-object in. Can someone please help me to solve this issue. I realise that I need to update my Hikashop Business Version and will do so once I have finished this website. Thanks in advance.

Thanks Nicolas, I really appreciate your help. Thats fixed my problem.