You need to register the Custom Taxonomy BEFORE the Custom Post Type that it belongs to in order for the rewrite rule to work. The taxonomy needs to “exist” before the post type in order for WordPress to build the URL correctly.
You need to register the Custom Taxonomy BEFORE the Custom Post Type that it belongs to in order for the rewrite rule to work. The taxonomy needs to “exist” before the post type in order for WordPress to build the URL correctly.