This should now be resolved.
I add this to your child theme:
/* GET GALLERY MEDIA
================================================== */
if ( !function_exists('sf_gallery_post') ) {
function sf_gallery_post($postID, $use_thumb_content) {
$gallery = '<div class="flexslider item-slider">'."\n";
$gallery .= '<ul class="slides">'."\n";
if ($use_thumb_content) {
$media_gallery = rwmb_meta('sf_thumbnail_gallery', 'type=image&size=full-width-image-gallery', $postID);
} else {
$media_gallery = rwmb_meta( 'sf_detail_gallery', 'type=image&size=fullwidth', $postID);
}
foreach ( $media_gallery as $image ) {
$gallery .= "<li><img src='{$image['url']}' width='{$image['width']}' height='{$image['height']}' alt='{$image['alt']}' /></li>";
}
$gallery .= '</ul>'."\n";
$gallery .= '</div>'."\n";
return $gallery;
}
}