error message

Since we updated we lost our custom template. We were getting the following error message:

Notice: woocommerce_get_template_part is verouderd sinds versie 3.0. Gebruik in plaats daarvan wc_get_template_part. in /home/sites/site37851/web/webshop/wp-includes/functions.php on line 3831

We managed to get the webshop up and running again but we can’t seem to get the picture of our products back on the catalog page . You can only see them when you click on a product. What can we do to fix it?

The page I need help with: [log in to see the link]