FAQ29 Gutenberg Crashes with Custom Post Type

If you see the following error in your browser, then your custom post type does not support custom fields.

Custom fields are used to store post meta data. Multi Rating Pro uses custom fields to store the rating form to use and any auto placement override settings. You can add support for custom fields by adding the following line of code in your functions.php file. Replace with the exact name of the custom post type.

add_post_type_support( '', 'custom-fields' );