Problems with the latest version of metabox vs mmb-settings-page

Hello Anh Tran, I'm using the example where the tab is defined in metabox but it does not work.

/ Register settings page. In this case, it's a theme options page
add_filter( 'mb_settings_pages', 'prefix_options_page' );
function prefix_options_page( $settings_pages )
{
	$settings_pages[] = array(
		'id'          => 'pencil',
		'option_name' => 'pencil',
		'menu_title'  => __( 'Pencil', 'textdomain' ),
		'icon_url'    => 'dashicons-edit',
		'style'       => 'no-boxes',
		'columns'     => 1,
		'tabs'        => array(
			'general' => __( 'General Settings', 'textdomain' ),
			'design'  => __( 'Design Customization', 'textdomain' ),
			'faq'     => __( 'FAQ & Help', 'textdomain' ),
		),
		'position'    => 68,
	);
	return $settings_pages;
}
// Register meta boxes and fields for settings page
add_filter( 'rwmb_meta_boxes', 'prefix_options_meta_boxes' );
function prefix_options_meta_boxes( $meta_boxes )
{
	$meta_boxes[] = array(
		'id'             => 'general',
		'title'          => __( 'General', 'textdomain' ),
		'settings_pages' => 'pencil',
		'tab'            => 'general',
		'fields' => array(
			array(
				'name' => __( 'Logo', 'textdomain' ),
				'id'   => 'logo',
				'type' => 'file_input',
			),
			array(
				'name'    => __( 'Layout', 'textdomain' ),
				'id'      => 'layout',
				'type'    => 'image_select',
				'options' => array(
					'sidebar-left'  => 'http://i.imgur.com/Y2sxQ2R.png',
					'sidebar-right' => 'http://i.imgur.com/h7ONxhz.png',
					'no-sidebar'    => 'http://i.imgur.com/m7oQKvk.png',
				),
			),
		),
	);
	$meta_boxes[] = array(
		'id'             => 'colors',
		'title'          => __( 'Colors', 'textdomain' ),
		'settings_pages' => 'pencil',
		'tab'            => 'design',
		'fields' => array(
			array(
				'name' => __( 'Heading Color', 'textdomain' ),
				'id'   => 'heading-color',
				'type' => 'color',
			),
			array(
				'name' => __( 'Text Color', 'textdomain' ),
				'id'   => 'text-color',
				'type' => 'color',
			),
		),
	);
	$meta_boxes[] = array(
		'id'             => 'info',
		'title'          => __( 'Theme Info', 'textdomain' ),
		'settings_pages' => 'pencil',
		'tab'            => 'faq',
		'fields'         => array(
			array(
				'type' => 'custom_html',
				'std'  => __( '<strong>Having questions?</strong><br><br><a href="https://metabox.io/docs/" target="_blank" class="button-primary">Go to our documentation</a>', 'textdomain' ),
			),
		),
	);
	return $meta_boxes;
}

In my tests I edited the inc/core.php file

	/**
	 * Register hooks.
	 */
	public function __construct()
	{
		$plugin = 'meta-box/meta-box.php';
		add_filter( "plugin_action_links_$plugin", array( $this, 'plugin_links' ) );
		add_action( 'plugins_loaded', array( $this, 'load_textdomain' ) );
		//EDIT init per admin_init
        add_action( 'init', array( $this, 'register_meta_boxes' ) );
        add_action( 'init', array( $this, 'register_wpml_hooks' ) );
        add_action( 'edit_page_form', array( $this, 'fix_page_template' ) );
	}

PER

	/**
	 * Register hooks.
	 */
	public function __construct()
	{
		$plugin = 'meta-box/meta-box.php';
		add_filter( "plugin_action_links_$plugin", array( $this, 'plugin_links' ) );
		add_action( 'plugins_loaded', array( $this, 'load_textdomain' ) );
		//EDIT init per admin_init
        add_action( 'admin_init', array( $this, 'register_meta_boxes' ) );
        add_action( 'admin_init', array( $this, 'register_wpml_hooks' ) );
		add_action( 'edit_page_form', array( $this, 'fix_page_template' ) );
	}

and edited the file inc / metabox.php

In the master version file has been removed to the lower part

	/**
	 * Get field class name. Only for backward compatibility.
	 * @param array $field Field array
	 * @return string Field class name
	 */
	public static function get_class_name( $field )
	{
		return RWMB_Field::get_class_name( $field );
	}

For me it worked the above modifications

Hi Anh Tran,unfortunately for me not work, I'm Environment
Below
metabox-master (Release does not have the correction of maps)
metabox 1.1.3 pages settings
wordpress 4.6
It only works with the changes I mentioned above in core.php files and meta-box.php