Display Image advaced

Hello,

Could you please help me displaying the uploaded image in a group:

<?php
add_filter( 'rwmb_meta_boxes', 'your_prefix_register_meta_boxes' );

function your_prefix_register_meta_boxes( $meta_boxes ) {
    $prefix = '';

$meta_boxes[] = array (
    'title' => esc_html__( 'Podcast', 'text-domain' ),
    'id' => 'podcast',
    'post_types' => array(
        0 => 'post',
    ),
    'context' => 'normal',
    'priority' => 'high',
    'fields' => array(
        array (
            'id' => $prefix . 'podcast_number',
            'type' => 'text',
            'name' => esc_html__( 'Episode Number', 'text-domain' ),
            'required' => 1,
            'columns' => 2,
        ),
        array (
            'id' => $prefix . 'podcast_author',
            'type' => 'text',
            'name' => esc_html__( 'Podcast Author/authors', 'text-domain' ),
            'required' => 1,
            'columns' => 3,
        ),
        array (
            'id' => $prefix . 'podcast_title',
            'type' => 'textarea',
            'name' => esc_html__( 'Podcast Title', 'text-domain' ),
            'rows' => 1,
            'cols' => 2,
            'required' => 1,
            'columns' => 7,
        ),
        array (
            'id' => $prefix . 'podcast_about',
            'name' => esc_html__( 'About podcast', 'text-domain' ),
            'type' => 'wysiwyg',
        ),
        array (
            'id' => $prefix . 'left_links_2',
            'name' => esc_html__( 'Links mentioned (left Column)', 'text-domain' ),
            'type' => 'wysiwyg',
            'columns' => 6,
        ),
        array (
            'id' => $prefix . 'right_links_2',
            'name' => esc_html__( 'Links mentioned (right Column)', 'text-domain' ),
            'type' => 'wysiwyg',
            'columns' => 6,
        ),
        array (
            'id' => $prefix . 'author_image',
            'type' => 'image_upload',
            'name' => esc_html__( 'Author image', 'text-domain' ),
            'max_status' => 1,
            'max_file_uploads' => 1,
            'image_size' => 'medium',
        ),
    ),
);

return $meta_boxes;

}

I need to add a shortcode for it. I've tried the code bellow but it won't work:

$images = rwmb_meta( 'author_image', array( 'limit' => 1 ) );
$image = reset( $images );
?>
">

Thanks