Reviews problem

Reviews on courses are not showing. I've read on that post that I have to copy and paste this but i'm not sure where I have to paste it because all my stuff is in french. The image in the post is where I think it need to be placed but I'm not sure. Sorry for my bad english :) https://ibb.co/Nt5Ghsf https://wplms.io/support/forums/topic/learning-management-system-reviews-issue/

add_action('wplms_after_course_description',function(){

global $post;

$post->comment_status="open";

});

add_action('bp_before_course_body',function(){

global $post;

$post->comment_status="open";

});

add_action('wplms_before_start_course',function(){

$course_id = 0;

if(isset($_POST) && isset($_POST['course_id'])){

$course_id = $_POST['course_id'];

}

if(empty($course_id ) && !empty($_COOKIE['course_id'])){

$course_id = $_COOKIE['course_id'];

}

if(!empty($course_id)){

wp_update_post(array('ID'=>$course_id,'comment_status' => 'open'));

}

});