3D FlipBook - my gallery shortcode doesn't filter by taxonomies

Hello, I need to display all the pdfs in the bulletins category. The shortcode I used is [3d-flip-book mode="thumbnail-lightbox" query='{"orderby": "date", "order": "DESC"}' style="height:auto;" cols="4" tax="bulletins"][/3d-flip-book]. It doesn't work. Please help. Regards