Custom Post Type UI Taxonomy Error? WordPress

Christianto answers:

Hi Patrick,

What happen if you deactivate the plugin and register the custom post type manually?

put on your functions.php

function carpet_init(){
// post type
$labels = array(
'name' => 'carpets',
'singular_name' => 'carpet',
'add_new' => 'Add carpet',
'add_new_item' => 'Add New carpet',
'edit' => 'Edit',
'edit_item' => 'Edit carpet',
'new_item' => 'New carpet',
'view_item' => 'View carpet',
'search_items' => 'Search carpets',
'not_found' => 'No carpets Found',
'not_found_in_trash' => 'No carpets Found in Trash',
'parent_item_colon' => '',
'menu_name' => 'carpets'
);
$args = array(
'label' => 'carpets',
'labels' => $labels,
'public' => true,
'show_ui' => true,
'show_in_menu' => true,
'query_var' => true,
'capability_type' => 'post',
'has_archive' => true,
'rewrite' => array('slug' => ''),
'hierarchical' => true,
'supports' => array('title','editor','excerpt','trackbacks','custom-fields','comments','revisions','thumbnail','author','page-attributes'),
'taxonomies' => array('style')
);
register_post_type('carpet',$args);

// taxonomy example
// uncomment if needed

$labels = array(
'name' => 'style',
'singular_name' => 'style Category',
'search_items' => __( 'style Categories' ),
'all_items' => __( 'All style Categories' ),
'parent_item' => __( 'Parent style Category' ),
'parent_item_colon' => __( 'Parent style Category:' ),
'edit_item' => __( 'Edit style Category' ),
'update_item' => __( 'Update style Category' ),
'add_new_item' => __( 'Add New style Category' ),
'new_item_name' => __( 'New style Category Name' ),
'menu_name' => __( 'Style' )
);

register_taxonomy(
'style',
array('carpet'),
array(
'hierarchical' => true,
'labels' => $labels,
'show_ui' => true,
'query_var' => true,
'rewrite' => true,
)
);

}
add_action('init', 'carpet_init');