Custom query with Elementor

I'm currently trying a custom query with Elementor, but it's not working.

I also tried a basic one (the example of the official website) and it's not working neither :

add_action( 'elementor/query/my_custom_filter', function( $query ) {
    $query->set( 'post_type', 'post' );
} );

Also, if I do var_dump($query), I have a query on another post.

Thanks for your help, Adrien.