Woocommerce Permalinks (products and categories)

I am doing a relaunch of an old page with wordpress and woocommerce. One requirement is that the link structure should be the same as the old page.

The link structure is as follows:

domain/instrumente/{product_category}/{product} // link to product page

domain/instrumente/{product_category} // shows all products with a certain category

I did managed to get the productlink right by tweaking in the permalink settings.
The category also are looking right in the frontend. But they are leading to a 404 page. I think that is because wordpress is expecting a product after the category slash.

How do i get the desired link structure? I tried Woocommerce Permalink Plugin, but i didn’t help me much. Help would be appreciated.