Does this code have anything to do with it?
function learningpath_slug(){
$obj=get_post_type_object('learningpath');
$obj->rewrite['slug']='leerlijnen';
register_post_type( 'learningpath',(array)$obj);
}
add_action('init', 'learningpath_slug',10);
Hi,
Refer this plugin to activate :
https://bit.ly/2HmI1B9
It just like customizer plugin , refer this to change your clp slug
http://prntscr.com/mukx2o