Help to display Options in Oxygen

Hi, I'm new in MB! I've working with Settings Page to upload the logo image and some images with links around the sidebar pages.

I've try using the Code Block from oxygen, but nothings happens: I using the follow code:

$banner_url = rwmb_meta( 'banner_url', ['object_type' => 'setting'], $option_name );
echo $banner_url; like the docs.

Some of my custom fields is a group. Now I'm trying create shortcodes to show the fields, and also trying use a raw php.
Thanks. I'm using the PRO version.

Thanks