404 error except for POSTNAME

I am getting 404 errors for /%category%/%postname%/ or /%cust_taxonomy%/%postname%/ I have made sure to flush the rewrite rules. But nothing seems to work. Are there any specific custom post type register options that need to be used? register_post_type('landing-page', array( 'label' => 'Landing Pages', 'description' => '', 'public' => true, 'show_ui' => true, 'show_in_menu' => true, 'capability_type' => 'page', 'hierarchical' => true, 'rewrite' => array( 'permastruct' => '/%category%/%postname%/'), 'query_var' => true, 'supports' => array('editor','title','revisions'), 'taxonomies' => array('campaigns','buyer-seg','stage','ddc-format','category'), 'labels' => array ( 'name' => 'my name', 'singular_name' => 'Landing Page', 'menu_name' => 'my name', 'add_new' => 'Add Landing Page', 'add_new_item' => 'Add New Landing Page', 'edit' => 'Edit', 'edit_item' => 'Edit Landing Page', 'new_item' => 'New Landing Page', 'view' => 'View Landing Page', 'view_item' => 'View Landing Page', 'search_items' => 'Search Landing Pages', 'not_found' => 'No Landing Pages Found', 'not_found_in_trash' => 'No Landing Pages Found in Trash', 'parent' => 'Parent Landing Page' ) ) https://wordpress.org/plugins/wp-permastructure/ Having the same problem. Any solution?