Include Group plug-in in theme files with Roots

Hi, thanks for your reply. I've moved the plug-ins and activated them as you said.
Here is the full meta-box registering code:

<?php
/********************* META BOX DEFINITIONS ***********************/

/**
 * Prefix of meta keys (optional)
 * Use underscore (_) at the beginning to make keys hidden
 * Alt.: You also can make prefix empty to disable it
 */
// Better has an underscore as last sign
$prefix = 'rw_';

global $meta_boxes;

$meta_boxes = array();

//Home page slider inclusion//////////////////////////////////////////////////////////////////////////////////

$meta_boxes[] = array(
	// Meta box id, UNIQUE per meta box. Optional since 4.1.5
	'id' => 'home-page-content',
	// Meta box title - Will appear at the drag and drop handle bar. Required.
	'title' => __( 'Conent for the Home Page', 'rwmb' ),
	// Post types, accept custom post types as well - DEFAULT is array('post'). Optional.
	'pages' => array( 'page' ),
	// Where the meta box appear: normal (default), advanced, side. Optional.
	'context' => 'normal',
	// Order of meta box: high (default), low. Optional.
	'priority' => 'high',
	// Auto save: true, false (default). Optional.
	'autosave' => true,
	// List of meta fields
	'fields' => array(
	// TEXT BOX ONE
	array(
		// Field name - Will be used as label
		'name'  => __( '1st Info Box Title', 'rwmb' ),
		'id'    => "{$prefix}1st_box_title",
		'desc'  => __( 'Enter the title for the first info box', 'rwmb' ),
		'type'  => 'text',
		'std'   => __( 'e.g what we do', 'rwmb' ),
		'clone' => false,
	),
	// TEXTAREA
	array(
		'name' => __( '1st Info Box text content', 'rwmb' ),
		'desc' => __( 'Text content for the first info box', 'rwmb' ),
		'id'   => "{$prefix}1st_box_content",
		'type' => 'textarea',
		'cols' => 20,
		'rows' => 3,
	),
	// TEXT BOX TWO
	array(
		// Field name - Will be used as label
		'name'  => __( '2nd Info Box Title', 'rwmb' ),
		'id'    => "{$prefix}2nd_box_title",
		'desc'  => __( 'Enter the title for the second info box', 'rwmb' ),
		'type'  => 'text',
		'std'   => __( 'e.g what we do', 'rwmb' ),
		'clone' => false,
	),
	// TEXTAREA
	array(
		'name' => __( '2nd Info Box text content', 'rwmb' ),
		'desc' => __( 'Text content for the second info box', 'rwmb' ),
		'id'   => "{$prefix}2nd_box_content",
		'type' => 'textarea',
		'cols' => 20,
		'rows' => 3,
	),
	// RADIO BUTTONS
	array(
		'name'    => __( 'Video or Image', 'rwmb' ),
		'id'      => "{$prefix}vid_img",
		'type'    => 'radio',
		// Array of 'value' => 'Label' pairs for radio options.
		// Note: the 'value' is stored in meta field, not the 'Label'
		'options' => array(
			'usevid' => __( 'Video', 'rwmb' ),
			'useimg' => __( 'Image', 'rwmb' ),
		),
	),
	// URL
	array(
		'name'  => __( 'Video URL', 'rwmb' ),
		'id'    => "{$prefix}vid_url",
		'desc'  => __( 'Paste the YouTube EMBED URL here', 'rwmb' ),
		'type'  => 'url',
		'std'   => 'http://youtube.com/',
	),
	// IMAGE ADVANCED (WP 3.5+)
	array(
		'name'             => __( 'Video Replacement Image', 'rwmb' ),
		'id'               => "{$prefix}vid_repl_img",
		'type'             => 'image_advanced',
		'max_file_uploads' => 1,
		'desc'			   =>'Upload images for the home page ad next to the video 900px by 510px',
	),
	// IMAGE ADVANCED (WP 3.5+)
	array(
		'name'             => __( 'Video image advertisement', 'rwmb' ),
		'id'               => "{$prefix}advert",
		'type'             => 'image_advanced',
		'max_file_uploads' => 1,
		'desc'			   =>'Upload images for the home page ad next to the video 720px by 200px',
	),
	// URL
	array(
		'name'  => __( 'Ad URL', 'rwmb' ),
		'id'    => "{$prefix}ad_url",
		'desc'  => __( 'Paste the URL where you want the ad to link to here', 'rwmb' ),
		'type'  => 'url',
		'std'   => '',
	),
	// 1st tag line
	array(
		// Field name - Will be used as label
		'name'  => __( '1st Tag Line', 'rwmb' ),
		'id'    => "{$prefix}1st_tag_line",
		'desc'  => __( 'Enter the 1st tag line here', 'rwmb' ),
		'type'  => 'text',
		'std'   => __( 'e.g across the planet', 'rwmb' ),
		'clone' => false,
	),
	// 2nd tag line
	array(
		// Field name - Will be used as label
		'name'  => __( '2nd Tag Line', 'rwmb' ),
		'id'    => "{$prefix}2nd_tag_line",
		'desc'  => __( 'Enter the 2nd tag line here', 'rwmb' ),
		'type'  => 'text',
		'std'   => __( 'e.g across the planet', 'rwmb' ),
		'clone' => false,
	),
	// IMAGE ADVANCED (WP 3.5+)
	array(
		'name'             => __( 'Images', 'rwmb' ),
		'id'               => "{$prefix}slideimg",
		'type'             => 'image_advanced',
		'max_file_uploads' => 3,
		'desc'			   =>'Upload images for the page backgrounds 1440px by 875px',
	),
	
	),
	'only_on'    => array(
		//'id'       => array( 1, 2 ),
		 //'slug'  => array( 'home' ),
		'template' => array( 'template-landing.php' ),
		//'parent'   => array( 10 )
	),
);

$meta_boxes[] = array(
	// Meta box id, UNIQUE per meta box. Optional since 4.1.5
	'id' => 'faq',
	// Meta box title - Will appear at the drag and drop handle bar. Required.
	'title' => __( 'Product FAQs', 'rwmb' ),
	// Post types, accept custom post types as well - DEFAULT is array('post'). Optional.
	'pages' => array( 'product' ),
	// Where the meta box appear: normal (default), advanced, side. Optional.
	'context' => 'normal',
	// Order of meta box: high (default), low. Optional.
	'priority' => 'low',
	// Auto save: true, false (default). Optional.
	'autosave' => true,
	// List of meta fields
	'fields' => array(
			// Group
			array(
			    'name' => 'Group', // Optional
			    'id' => 'group_id',
			    'type'   => 'group', // Group type
			    'clone'  => true,    // Can be cloned?
					// TEXTAREA
					array(
						'name' => __( 'FAQ', 'rwmb' ),
						'desc' => __( 'Add the FAQ here', 'rwmb' ),
						'id'   => "{$prefix}faq",
						'type' => 'textarea',
						'cols' => 20,
						'rows' => 3,
						'clone' => true,
					),
			)
	
	
	),

);

/********************* Add more meta boxes below ***********************/

/********************* META BOX REGISTERING ***********************/

/**
 * Register meta boxes
 *
 * @return void
 */
function rw_register_meta_boxes()
{
	global $meta_boxes;

	// Make sure there's no errors when the plugin is deactivated or during upgrade
	if ( class_exists( 'RW_Meta_Box' ) ) {
		foreach ( $meta_boxes as $meta_box ) {
			if ( isset( $meta_box['only_on'] ) && ! rw_maybe_include( $meta_box['only_on'] ) ) {
				continue;
			}

			new RW_Meta_Box( $meta_box );
		}
	}
}

add_action( 'admin_init', 'rw_register_meta_boxes' );

/**
 * Check if meta boxes is included
 *
 * @return bool
 */
function rw_maybe_include( $conditions ) {
	// Include in back-end only
	if ( ! defined( 'WP_ADMIN' ) || ! WP_ADMIN ) {
		return false;
	}

	// Always include for ajax
	if ( defined( 'DOING_AJAX' ) && DOING_AJAX ) {
		return true;
	}

	if ( isset( $_GET['post'] ) ) {
		$post_id = $_GET['post'];
	}
	elseif ( isset( $_POST['post_ID'] ) ) {
		$post_id = $_POST['post_ID'];
	}
	else {
		$post_id = false;
	}

	$post_id = (int) $post_id;
	$post    = get_post( $post_id );

	foreach ( $conditions as $cond => $v ) {
		// Catch non-arrays too
		if ( ! is_array( $v ) ) {
			$v = array( $v );
		}

		switch ( $cond ) {
			case 'id':
				if ( in_array( $post_id, $v ) ) {
					return true;
				}
			break;
			case 'parent':
				$post_parent = $post->post_parent;
				if ( in_array( $post_parent, $v ) ) {
					return true;
				}
			break;
			case 'slug':
				$post_slug = (!empty( $post->post_name));
				if ( in_array( $post_slug, $v ) ) {
					return true;
				}
			break;
			case 'template':
				$template = get_post_meta( $post_id, '_wp_page_template', true );
				if ( in_array( $template, $v ) ) {
					return true;
				}
			break;
		}
	}

	// If no condition matched
	return false;
}

but I'm still getting the following error message in the editor:

Notice: Undefined index: fields in /Users/Lee/Sites/akita/wp-content/plugins/meta-box-group/group.php on line 43

Warning: Invalid argument supplied for foreach() in /Users/Lee/Sites/akita/wp-content/plugins/meta-box-group/group.php on line 43

Thank you - appears to be working now!