WordPress: Возможности Пользовательский Тип сообщения delete_post не работает

Я нашел ошибку в вашем коде, поэтому переписываю ваш полный код.

Примечание: вы можете перевести его на свой язык

function tallers_grup_post_type() {

// Set UI labels for Custom Post Type
$labels = array(
'name'                => _x( 'Aquí t’escoltem',  'tallers_grup' ),
'singular_name'       => _x( 'Taller i activitat per a grups', 'tallers_grup' ),
'menu_name'           => __( 'Aquí t’escoltem', 'tallers_grup' ),
'parent_item_colon'   => __( 'Parent Aquí t’escoltem', 'tallers_grup' ),
'all_items'           => __( 'Totes les entrades', 'tallers_grup' ),
'view_item'           => __( 'Veure', 'tallers_grup' ),
'add_new_item'        => __( 'Afegeix nova entrada', 'tallers_grup' ),
'add_new'             => __( 'Afegeix', 'tallers_grup' ),
'edit_item'           => __( 'Editar', 'tallers_grup' ),
'update_item'         => __( 'Actualizar', 'tallers_grup' ),
'search_items'        => __( 'Buscar ', 'tallers_grup' ),
'not_found'           => __( 'Extraviado', 'tallers_grup' ),
'not_found_in_trash'  => __( 'No encontrado en la basura', 'tallers_grup' ),
);


$capabilities = array(
'publish_posts'        => 'publish_tallers_grup',
'edit_posts'           => 'edit_tallers_grup',
'edit_others_posts'    => 'edit_others_tallers_grup',
'delete_posts'         => 'delete_tallers_grup',
'delete_others_posts'  => 'delete_others_tallers_grup',
'read_private_posts'   => 'read_private_tallers_grup',
'edit_post'            => 'edit_tallers_grup',
'delete_post'          => 'delete_tallers_grup',
'read_post'            => 'read_tallers_grup',
'create_posts'         => 'edit_create_tallers_grup',
);


// Set other options for Custom Post Type
$args = array(
'label'               => __( 'Tallers grup', 'tallers_grup' ),
'description'         => __( 'Entrades d\'aqui t\'escoltem', 'tallers_grup' ),
'labels'              => $labels,
'supports'            => array( 'title', 'editor', 'excerpt', 'author', 'thumbnail', 'comments', 'custom-fields', ),
'hierarchical'        => false,
'public'              => true,
'show_ui'             => true,
'show_in_menu'        => true,
'show_in_nav_menus'   => true,
'show_in_admin_bar'   => true,
'menu_position'       => 5,
'menu_icon'           => 'dashicons-download',
'can_export'          => true,
'has_archive'         => true,
'exclude_from_search' => false,
'publicly_queryable'  => true,
'capability_type'     => 'tallers_grup',
'capabilities'        => $capabilities,
);
// Registering your Custom Post Type
register_post_type( 'tallers_grup', $args );
}
add_action( 'init', 'tallers_grup_post_type', 0 );
///********************** CUSTOM ROLE *****************************/
add_role('dictionary_entry_author', 'Grup de tallers de dirigents', array (
'publish_dictionary_entry' => true,
'edit_dictionary_entry' => true,
'edit_others_dictionary_entry' => true,
'delete_dictionary_entry' => true,
'delete_others_dictionary_entry' => true,
'read_private_dictionary_entry' => true,
'edit_dictionary_entry' => true,
'delete_dictionary_entry' => true,
'read_dictionary_entry' => true,
// more standard capabilities here
'read' => true,
)
);
//==============================================
add_action( 'init', 'create_tallers_grup_taxonomies', 0 );

function create_tallers_grup_taxonomies() {
// Add new taxonomy, make it hierarchical (like categories)
$labels = array(
'name'              => _x( 'Tallers Grup Categoría', 'tallers_grups' ),
'singular_name'     => _x( 'Tallers Grup Categoría', 'tallers_grups' ),
'search_items'      => __( 'Search Tallers Grup Categoría' ),
'all_items'         => __( 'Todas Tallers Grup Categoría' ),
'parent_item'       => __( 'Parent Tallers Grup Categoría' ),
'parent_item_colon' => __( 'Parent Tallers Grup Categoría:' ),
'edit_item'         => __( 'Editar Tallers Grup Categoría' ),
'update_item'       => __( 'Actualizar Tallers Grup Categoría' ),
'add_new_item'      => __( 'Agregar nuevo Tallers Grup Categoría' ),
'new_item_name'     => __( 'Nuevo Tallers Grup Categoría' ),
'menu_name'         => __( 'Tallers Grup Categoría' ),
);

$args = array(
'hierarchical'      => true,
'labels'            => $labels,
'show_ui'           => true,
'show_admin_column' => true,
'query_var'         => true,
'rewrite'           => array( 'slug' => 'tallers_grups' ),
);
register_taxonomy( 'tallers_grups', array( 'tallers_grup' ), $args );
}

function add_tallers_grup_caps() {
$role = get_role( 'administrator' );

$role->add_cap( 'edit_tallers_grup' );
$role->add_cap( 'edit_tallers_grups' );
$role->add_cap( 'edit_tallers_grups' );
$role->add_cap( 'publish_tallers_grups' );
$role->add_cap( 'read_tallers_grup' );
$role->add_cap( 'read_private_tallers_grups' );
$role->add_cap( 'delete_tallers_grup' );
$role->add_cap( 'edit_published_tallers_grups' );
$role->add_cap( 'delete_published_tallers_grups' );
$role->add_cap( 'edit_create_tallers_grup' );
$role->add_cap( 'edit_create_tallers_grups' );
}
add_action( 'admin_init', 'add_tallers_grup_caps');