Custom Post Type won’t Register

June 5, 2022 by Tarik Billa

“movie-special-features” is longer than 20 chars. If you enable debug, you will get a message, these names are not allowed longer than 20 cars.
Reference: https://codex.wordpress.org/Function_Reference/register_post_type

You can enable the debug mode in you wp-config.php with

define( 'WP_DEBUG', true );