Custom Taxonomy "most common" not appearing

Hi: I’m running a child theme with multiple custom taxonomies. One of them “producer link” is not working correctly. The most common feature isn’t working.

Here is how I registered it.

`// Producer Link
$producerlink_labels = array(
‘name’ => _x( ‘Producer Link’, ‘taxonomy general name’ ),
‘singular_name’ => _x( ‘Producer Link’, ‘taxonomy singular name’ ),
‘search_items’ => __( ‘Search in producer links’ ),
‘popular_items’ => __( ‘Popular producer links’ ),
‘all_items’ => __( ‘All producer links’ ),
‘most_used_items’ => null,
‘parent_item’ => null,
‘parent_item_colon’ => null,
‘edit_item’ => __( ‘Edit producer link’ ),
‘update_item’ => __( ‘Update producer link’ ),
‘add_new_item’ => __( ‘Add new producer link’ ),
‘new_item_name’ => __( ‘New producer link name’ ),
‘separate_items_with_commas’ => __( ‘Separate producer links with commas’ ),
‘add_or_remove_items’ => __( ‘Add or remove producer links’ ),
‘choose_from_most_used’ => __( ‘Choose from the most common producer links’ ),
‘menu_name’ => __( ‘Producer Link’ ),
);
register_taxonomy(‘producer link’,array(‘producers’,’wines’),array(
‘hierarchical’ => false,
‘labels’ => $producerlink_labels,
‘show_ui’ => true,
‘update_count_callback’ => ‘_update_post_term_count’,
‘query_var’ => true,
‘rewrite’ => array(‘slug’ => ‘producer-link’ )
));`