Need solution for 404s produced by $query->set

I posted this question in “GeoDirectory Core Plugin support” and then read the support policy and decided that I should post here:

My function for querying custom post types that are created independently of Geodirectory causes the Geodirectory listings to be 404. And including the Geodirectory “gd_place” post type in the $query->set (below) does not solve the problem. Do you have a solution?

add_action(‘pre_get_posts’, function( $query ) {
//Exit if not Main Query
if (!$query->is_main_query()){
return;
}
//If Querying Posts & Pages, Update Query to include Custom Post Types
if (!empty($query->query[‘name’]) ) {
$query->set(‘post_type’, array(‘post’, ‘page’, ‘locations’, ‘services’) );
}
});