Hello, I have problem setting search facet for product category. I don't want to use provided taxonomy/term view for product categories.

I have enabled field Category in Search API (admin/config/search/search_api/index/product_index/fields) and added that facet block through Context. Reindexed everything but Facet is not displaying. How can I enable Category Facet? I don't know what I'm doing wrong.

Thanks.