WP nonce invalid

Question

Have a quick script to search for untranslated pages, and then returning a translate link. (Polylang makes a new post for a translation, which is then linked to the original.)

All is working well, except the nonce:

$url = admin_url('post-new.php?post_type=product&from_post=' . $ID . '&new_lang=' . $lang);

$nonce_url = wp_nonce_url($url);

Returns a beautifully formatted url, with an invalid nonce:

https://yaddayadda.com/wp-admin/post-new.php?post_type=product&from_post=2851&new_lang=nl&_wpnonce=fb63ac7002

The link in the admin panel reads exactly the same, but with a working nonce:

https://yaddayadda.com/wp-admin/post-new.php?post_type=product&from_post=2851&new_lang=nl&_wpnonce=c17b1a3a2a

I like to think Im alright with WP, but this is breaking my head. Does anyone have any sort of idea why it is generating invalid links??

Full code:

require_once('../../../wp-load.php');

$lang = $_POST['lang'];
if ($lang == 'nl') { $language = 'Dutch';}
elseif ($lang == 'pt') { $language = 'Portuguese';}
else { $language = 'Something is going awry, I dont know ' . $lang;}

echo '<h2>Missing ' . $language . ' translations</h2>';
// An array of all published WC_Product Objects
$products = wc_get_products( array( 'status' => 'publish', 'limit' => -1,'lang' => 'en', ) );

// Displaying the number of products in this array
echo '<p>Total number of products published: ' . sizeof( $products ) . '</p>';

// Loop through products and save some data using WC_Product and stuff in array
$tobearray = [];
$count = 0;
foreach ( $products as $product ){
    $ID = $product->get_id();
    $title = $product->get_title();

    if (!pll_get_post($ID, $lang)) {

                  $url = admin_url('post-new.php?post_type=product&from_post=' . $ID . '&new_lang=' . $lang);

                  $nonce_url = wp_nonce_url($url);
                      //wp_nonce_url( $url);  // Adding our nonce to the url with a unique id made from the expiry timestamp

        $addpostlink = '<a href="' . wp_nonce_url('/wp-admin/post-new.php?post_type=product&from_post=' . $ID . '&new_lang=' . $lang) . '" target="_blank"> click here</a>';


        $tobearray[] = ['ID' => $ID, 'Title' => $title, 'Link' => $addpostlink ];
        $count++;
        }
}
echo '<p>Number of Products that are missing their ' . $lang . ' translation: ' . $count . '</p>';
echo 'Posts that need a ' . $language . ' translation: ';

?>
<p>
    Click on the link in the table below to create a new translation.  After the link opens (its a bit slow, pls wait), just open the original English product to copy and paste the title and description so you can translate them.
</p>
<table border="1">
<tr><th>ID</th><th>Title</th><th>Link</th></tr> 
<?php foreach($tobearray as $row) {
  echo('<tr>');
  echo('<td>');
  echo(implode('</td><td>', $row));
  echo('</td>');
  echo('</tr>');
} ?>
</table>

Answer 1

Found out what the problem was. Polylang plugin verifies the nonces, so you need to pass it the 'new-post-translation' arg.

The solution is: wp_nonce_url( $link, 'new-post-translation' );

it might help someone, but maybe no ;)