I bumped into a specific problem.
I have portfolio widget on the main page with my projects and sorting/filtering by categories (slugs) works just fine on main page when clicking on different buttons.
When I open whatever project, it opens on a new page and shows this project and what category is this project in.
But when I click on that category, I get “Nothing found”
Any idea where the problem could be?
(I am using polylang plugin, not sure if relevant here)