Tanslated product error 404

I need help.
I use Polylang at last version. I activate Hyyan WooCommerce Polylang Integration plug-in to.
I have a problem with Woocommerce.
All my page work fine, but the product don’t work. In italian (main language) is ok, but the english transalted page make 404 error page. All product.
Why?
This is the website http://www.outsiderbags.it, here the one english product http://www.outsiderbags.it/en/prodotto/original-trademark-en/heavy-weighter-58171-2/ and here the italian one http://www.outsiderbags.it/prodotto/original-trademark/heavy-weighter-58171/.

https://wordpress.org/plugins/polylang/