403 Forbidden

<?php
namespace ElementorPro\Modules\Library\Classes;

use Elementor\TemplateLibrary\Source_Local;
use ElementorPro\Plugin;

if ( ! defined( 'ABSPATH' ) ) {
	exit; // Exit if accessed directly
}

class Shortcode {

	const SHORTCODE = 'elementor-template';

	public function __construct() {
		$this->add_actions();
	}

	public function admin_columns_headers( $defaults ) {
		$defaults['shortcode'] = esc_html__( 'Shortcode', 'elementor-pro' );

		return $defaults;
	}

	public function admin_columns_content( $column_name, $post_id ) {
		if ( 'shortcode' === $column_name ) {
			printf(
				'<input class="elementor-shortcode-input" type="text" readonly onfocus="this.select()" value="%s" />',
				// %s = shortcode, %d = post_id
				esc_attr( sprintf( '[%s id="%d"]', self::SHORTCODE, $post_id ) )
			);
		}
	}

	public function shortcode( $attributes = [] ) {
		if ( empty( $attributes['id'] ) ) {
			return '';
		}

		$include_css = false;

		if ( isset( $attributes['css'] ) && 'false' !== $attributes['css'] ) {
			$include_css = (bool) $attributes['css'];
		}

		return Plugin::elementor()->frontend->get_builder_content_for_display( $attributes['id'], $include_css );
	}

	private function add_actions() {
		if ( is_admin() ) {
			add_action( 'manage_' . Source_Local::CPT . '_posts_columns', [ $this, 'admin_columns_headers' ] );
			add_action( 'manage_' . Source_Local::CPT . '_posts_custom_column', [ $this, 'admin_columns_content' ], 10, 2 );
		}

		add_shortcode( self::SHORTCODE, [ $this, 'shortcode' ] );
	}
}