Meta Box

Hello,

I think it's good, except for one point, it could not work because the settings page is not a post type. So you should remove this condition

get_post_type( $object_id ) === 'settings_page'

Hello Joe,

First, you need to remove the default product description and product excerpt by using this code

add_action( 'init', function () {
    remove_post_type_support( 'product', 'editor' );
} );

function remove_short_description() {
     remove_meta_box( 'postexcerpt', 'product', 'normal');
}
add_action('add_meta_boxes', 'remove_short_description', 999);

Then register two custom fields with the ID content and excerpt and put them anywhere in a field group then assign the field group to the Product post type.

$meta_boxes[] = [
    'title'      => __( 'Product meta', 'your-text-domain' ),
    'id'         => 'product-meta',
    'post_types' => ['product'],
    'fields'     => [
        [
            'name' => __( 'Product Content', 'your-text-domain' ),
            'id'   => 'content',
            'type' => 'wysiwyg',
        ],
        [
            'name' => __( 'Product Excerpt', 'your-text-domain' ),
            'id'   => 'excerpt',
            'type' => 'wysiwyg',
        ],
    ],
];

Hello,

If you want to update the image on the settings page to the image custom field on a/some posts, you can try to use the action hook rwmb_{$field_id}_after_save_field. Follow the documentation https://docs.metabox.io/actions/rwmb-after-save-field/

If you just want to display the image on the frontend, you can use the shortcode. For example:

[rwmb_meta id="image_field_id" object_id="settings_page_option" object_type="setting"]

Follow the documentation https://docs.metabox.io/shortcode/

Hello,

Please go to the My Account page and download a fresh version of MB User Profile 2.4.1 and re-install it on your site then let me know how it goes.

If you are not an administrator user, you need to have the right capabilities to access the CPT of Meta Box to create field groups, post types, taxonomies, views ...
See this screenshot https://imgur.com/eMDtzdv

You can go to Users > User Role Editor > Assign capabilities to the custom role. For example: manage_options, all capabilities in the Core section. For further information, please read more here
https://wordpress.org/documentation/article/roles-and-capabilities/

Hello,

Do you mean to add a field to an existing field group? If yes, please try to increase the PHP setting max_input_vars and see if it helps. Read more about the PHP setting in the documentation https://metabox.io/wordpress-custom-fields-not-saving-increase-max-input-vars/

Hello,

If you want to output the selected choices, please follow the documentation https://docs.metabox.io/fields/select/#template-usage

If you want to output all supported choices, please use the function rwmb_get_field_settings(). Refer to the documentation https://docs.metabox.io/functions/rwmb-get-field-settings/