undefined error in combination products version 8.1

[lordhanuman]

I upgraded from Prestashop 8.0 to 8.1. I have loaded some products with combination, The problem is that when I change combination it shows the undefined error.

if I disable friendly URLs the problem does not arise. I have a dedicated server with nginx php 8.1 and I have mencached caching enabled. However, this problem also occurs with non-native modules deactivated.

The shop is currently in 3 languages, Italian, English and French

Thanks to all

 

[seakrebel]

Try editing your NGINX configuration to include the following: 

server {
[...]
  location ~* ^/(en|it|fr)(/.*)?$ {
    rewrite ^/(en|it|fr)(/.*)?$ /index.php?lang=$1&$args last;
    try_files $uri $uri/ /index.php$is_args$args;
  }
[...]
}

Edited February 26 by seakrebel
got working code (see edit history)

[Massimo]

Hi,

i've try this solution but on Prestashop 8.1.5 doesn't Work.

All Site work correctly but not for change combination or add to cart.

[musicmaster]

Look in the server error log or under /var/logs for the error message. Usually this is a PHP error in an ajax call.