Products on one category Dissapeared

Yesterday I updated Woocommerce to version 2.6. This ‘broke the site’ and I retored it back to the current version (i’m still quite new to this and didn’t want the live site to be down)
The problem I have now, is some of the categories/prdocuts have dissapeared from the site, but only on one of the categories(although still in the back end). The link is

https://www.ribbonselect.com/product-category/printer-ribbons/

Any help would be appreciated!

https://wordpress.org/plugins/woocommerce/