This feature require Advanced Custom Fields plugin to works
The ACF Fields widget allows to dynamically display a custom field created with Advanced Custom Fields (ACF). Manage and style it as you like whether it is a text, a textarea, a select, a number, a date_time, a date, an embed video, a file, a url, an image, a wysiwyg. The ACF fields widget can be used on a template or on a single or archive type page:
- Single Posts;
- Terms archive;
- User Page;
- Options page.
Advanced Custom Fields plugin is not included.