Meta Box

Hi Long,
I tried to deactivate all plugins except Oxygen,Metabox and Metabox AIO, no luck...
Although I use the visual version of metabox, If I go to "Generate PHP" to grab the code the result is as follows:

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

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

$meta_boxes[] = [
    'title'      => __( 'Prezzo vendita', 'your-text-domain' ),
    'id'         => 'prezzo-vendita',
    'post_types' => ['vendita'],
    'fields'     => [
        [
            'name'          => __( 'VALORE VENDITA', 'your-text-domain' ),
            'id'            => $prefix . 'valore_vendita',
            'type'          => 'number',
            'step'          => 'any',
            'required'      => true,
            'admin_columns' => 'after Title',
        ],
    ],
];
return $meta_boxes;
}

It is a development site, if you want the credentials pls let me know