Page de lien permanent de type de publication personnalisée introuvable

J'aiperdu des heureset des heures àessayer de résoudre unproblème de lienpermanent avec destypes depublicationpersonnalisés. Il continue de renvoyer lapageintrouvable (404). Quandj'utilise lespermalienspar défaut,çamarche,mais quandje passe aupost-name,ça casse. J'aiessayé de changer lenom du slug,de réécrireparpurge,de désactivertous lesplug-ins,unplug-in "lienpermanent detype depublicationpersonnalisé",letout sansgain.

Quelqu'un a desproblèmes similaires? Je suis sur la dernière version 4.0.1 de WordPresset voicimon code defunctions.php:

 function authors_post_type() {
    $labels = array(
        'name'              => _x('Authors', 'post type general name'),
        'singular_name'     => _x('Author', 'post type singular name'),
        'add_new'           => _x('Add New', 'author'),
        'add_new_item'      => __('Add New Author'),
        'edit_item'         => __('Edit Author'),
        'new_item'          => __('New Author'),
        'all_items'         => __('All Authors'),
        'view_item'         => __('View Author'),
        'search_items'      => __('Search Authors'),
        'not_found'         => __('No authors found'),
        'menu_name'         => __('Authors')
    );
    $args = array(
        'labels'             => $labels,
        'public'             => true,
        'publicly_queryable' => true,
        'menu_position'     => 5,
        'show_ui'            => true,
        'show_in_menu'       => true,
        'query_var'          => true,
        'rewrite'            => array( 'slug' => 'authors' ),
        'capability_type'    => 'post',
        'has_archive'        => true,
        'hierarchical'       => true,
        'menu_position'      => null,
        'supports'           => array( 'title', 'editor', 'author', 'thumbnail' )
    );
    register_post_type('authors', $args);
}
add_action('init', 'authors_post_type');
 

I've been wasting hours and hours trying to solve a permalink issue with custom post types. It keeps returning page not found (404). When I use the default permalinks, it works, but when I switch to post-name, it breaks. I have tried changing the slug name, flush rewrite, disabling all plug-ins, a 'custom post type permalink' plug-in all to no gain.

Anyone have similar issues? I'm on the latest 4.0.1 version of WordPress and here is my code from functions.php:

function authors_post_type() {
    $labels = array(
        'name'              => _x('Authors', 'post type general name'),
        'singular_name'     => _x('Author', 'post type singular name'),
        'add_new'           => _x('Add New', 'author'),
        'add_new_item'      => __('Add New Author'),
        'edit_item'         => __('Edit Author'),
        'new_item'          => __('New Author'),
        'all_items'         => __('All Authors'),
        'view_item'         => __('View Author'),
        'search_items'      => __('Search Authors'),
        'not_found'         => __('No authors found'),
        'menu_name'         => __('Authors')
    );
    $args = array(
        'labels'             => $labels,
        'public'             => true,
        'publicly_queryable' => true,
        'menu_position'     => 5,
        'show_ui'            => true,
        'show_in_menu'       => true,
        'query_var'          => true,
        'rewrite'            => array( 'slug' => 'authors' ),
        'capability_type'    => 'post',
        'has_archive'        => true,
        'hierarchical'       => true,
        'menu_position'      => null,
        'supports'           => array( 'title', 'editor', 'author', 'thumbnail' )
    );
    register_post_type('authors', $args);
}
add_action('init', 'authors_post_type');