instant cms. Content management. what can stop the action?

Question

PHP

Created a new content type from the admin panel.
when creating a record, it directs to the page
/showplaces/add/3?back=/admin/content but it shows 404. As soon as I figured out the content, the content controller controls it, it has an add action. other content types are added normally (though through the frontend). That is, /albums/add/3?back=/admin/content works, by this link in before() (frontend.php, no backend.php) I write die('stop') and see my stop, but here amnavi. net/showplaces/add/3?back=/admin/content - 404. What can stop code before before? (parent::before() works)