/** * Fully Disable Gutenberg editor. */ add_filter('use_block_editor_for_post_type', '__return_false', 10); // Don't load Gutenberg-related stylesheets add_action( 'wp_enqueue_scripts', 'remove_block_css', 100 ); function remove_block_css() { wp_dequeue_style( 'wp-block-library' ); // WordPress core wp_dequeue_style( 'wp-block-library-theme' ); // WordPress core }