Undefined variable $background_image – template-functions.php on line 259

Warning message is shown on the top of the product tag page “Warning: Undefined variable $background_image in?/home/XXXX/XXXX/public_html/wp-content/themes/vilva/inc/template-functions.php?on line?259” in the website using the theme Vilva and woocommerce.

Is it possible for your team to solve this message by updating the theme or do I have to create a child theme to delete this message by myself?