Getting field values from Settings page

I am probably missing something obvious but can't get the URL of an image-type field from a Settings page to appear on the front end.

Settings page:

<?php
add_filter( 'mb_settings_pages', 'custom_settings_page' );

function custom_settings_page( $settings_pages ) {
    $settings_pages[] = [
        'menu_title'  => __( 'Options', 'project-name' ),
        'option_name' => 'my_options',
        'position'    => 25,
        'columns'     => 1,
        'icon_url'    => 'dashicons-admin-generic',
    ];

    return $settings_pages;
}

Field group:

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

function custom_sitewide_fields_group( $meta_boxes ) {
    $prefix = 'settings_';

    $meta_boxes[] = [
        'title'          => __( 'Sitewide', 'project-name' ),
        'id'             => 'sitewide',
        'settings_pages' => ['my-options'],
        'fields'         => [
            [
                'name'              => __( 'Logo', 'project-name' ),
                'id'                => $prefix . 'logo',
                'type'              => 'image',
                'label_description' => __( 'Upload/select site\'s logo image', 'project-name' ),
                'max_file_uploads'  => 1,
            ],
            [
                'name'              => __( 'Notice', 'project-name' ),
                'id'                => $prefix . 'notice',
                'type'              => 'wysiwyg',
                'label_description' => __( 'If present, will appear above the site header. Can be used for specials and promotional messages.', 'project-name' ),
            ],
            [
                'name' => __( 'Button Background Color', 'project-name' ),
                'id'   => $prefix . 'button_background_color',
                'type' => 'color',
            ],
        ],
    ];

    return $meta_boxes;
}

Here's the code that shows just blank output:

<?php
$value = rwmb_meta( 'logo', ['object_type' => 'setting'], 'my_options' );
echo $value['url'];
?>

Any idea?