Hello,
You're in a product listing ; you want the categories of the products ?
If that's so, you need to read the information directly in the list of product objects.
You can't really have the information in the view "product / listing" because you are not "browsing" the products.
As I told you, the information is directly in the product object, so you need to read the product categories for each product during the "loop", when you have access to the product via
Then you will have access to
Regards,