Nginxn redirect page

I need to redirect a page that is created from my theme. I already open tickets at several support teams, but they couldn't figure it out, so thought, he, we use the power full Nginx and rewrite rules.

But when using these I get 404 not found. I cleaned the cache, did a save on permlinks but no go.
Example below

Code (Text):

  #include /usr/local/nginx/conf/wpincludes/domain.com/rediscache_domain.com.conf;
  # if using the ultimate badbot blocker guide after testing
  # https://community.centminmod.com/threads/nginx-ultimate-bad-block-blocker.14413/
  include /usr/local/nginx/conf/ultimate-badbot-blocker/bots.d/ddos.conf;
  include /usr/local/nginx/conf/ultimate-badbot-blocker/bots.d/blockbots.conf;


#location = /coupons {
#  return 301 /bedrijven;
#}

#location ~ ^/coupons/(.*) {
#     rewrite ^ https://domain.com/bedrijven/$1;
#}

# Custom Redirects
#    rewrite ^/coupons$ /bedrijven permanent;

location / {
  include /usr/local/nginx/conf/503include-only.conf;


  # Enables directory listings when index file not found
  #autoindex  on;

  # for wordpress super cache plugin
  #try_files /wp-content/cache/supercache/$http_host/$cache_uri/index.html $uri $uri/ /index.php?q=$uri&$args;

 

Fixed all issues in child them

Code (Text):

function mts_child_init() {
    $args = get_taxonomy('mts_coupon_categories');
    $args->rewrite['slug'] = 'bedrijven_cat';
    register_taxonomy($args->name, 'coupons', $args);
    $args = get_taxonomy('mts_coupon_tag');
    $args->rewrite['slug'] = 'bedrijven_tag';
    register_taxonomy($args->name, 'coupons', $args);
}
add_action( 'init', 'mts_child_init', 11 );

// Change Coupons slug
add_filter('register_post_type_args', 'change_coupons_cpt_slug', 10, 2);
function coupons_cpt_slug($args, $post_type){
    if ($post_type == 'coupons'){
        $args['rewrite']['slug'] = 'bedrijven';
    }
    return $args;
}
//End Change Coupons slug