Reply To: TypeError: selected.forEach is not a function

Thanks for your reply Anh.

This are the extensions I use:

// Initialize Metaboxes
require get_template_directory() . '/lib/metaboxes/meta-box.php';
// Extensions
require get_template_directory() . '/lib/extensions/meta-box-builder/meta-box-builder.php';
require get_template_directory() . '/lib/extensions/meta-box-group/meta-box-group.php';
require get_template_directory() . '/lib/extensions/meta-box-columns/meta-box-columns.php';

// Create metaboxes
require_once('metabox-works.php');

I've updated all earlier today with same result.

Versions:
metabox 4.15.6
builder 2.9.4
group 1.2.16
columns 1.2.3