WooCommerce + MailChimp product categories

Hello,

I have the same problem as described here: https://www.ads-software.com/support/topic/vendor-field-for-mailchimp-to-recognize-product-categories/
The questioned wasn’t answered unfortunately.

I want to send customers who bought a product in a certain category an email. However, in the MailChimp category-selection field, my product categories don’t appear! How can this be fixed?

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