Meta Box

Hello Luca,

If you want to translate the custom field value with WPML, please follow the documentation https://metabox.io/translate-custom-fields-with-wpml/

If you edit the page in the second language and do not see the custom field, I think you can try to set the post type meta-box in WPML > Settings to Not translatable to fix the issue. If it doesn't work, I recommend contacting WPML support to get more information.

Hello,

You might need to use the code to check the block or classic editor is available when editing the post and registering the meta box. For example:

if( code_check_editor_here ) {
    add_filter( 'rwmb_meta_boxes', 'your_prefix_function_name' );
}

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

    $meta_boxes[] = [
        ...
    ];

    return $meta_boxes;
}

Hello,

You are correct, I can reproduce the issue 2 meta boxes with two plugins Meta Box and MB Relationships. But not the error message. It works if you use the plugin Meta Box AIO.
I've escalated this issue to the development team to fix it in the next update.

Thank you.

Hello Fabien,

You should disable the option reciprocal in this case. This option is used when you create a relationship between the same post type/object, for example: from office to office. It will prevent displaying two meta boxes on one post.

Hello,

I'm using PHP 7.4.33 on my demo site and don't see that. Also, according to the documentation, we recommend using PHP 7.4 or greater with Meta Box.
https://docs.metabox.io/installation/

Hello,

I've tested on an online staging site (fresh installation) and a real mobile, not a local site. I'm not sure what's wrong with your local site but glad to hear it works on the live site.

Hello,

It looks related to this issue https://support.metabox.io/topic/error-when-using-cloneable-groups-and-group-skin/
Please wait for the next update of the plugin MB Elementor Integrator to fix the issue.