Multilanguage site, error 404 at combination selection , English language only

[siomosp]

Hello,

i need some help
At a multilanguage site Greek , English , only at English language
at product combination selection there is 404 error when clicking a combination
To Reproduce
Product Greek laguage working

https://www.stickit.gr/el/pinakes-se-kamva/themata/topia/red-leafs-pinakas-se-kamva

The same product English Language not working
https://www.stickit.gr/en/canvas-prints/themes/nature/canvas-print-red-leafs-en-16918

Sample Post when selecting combination
Product Greek laguage working

https://www.stickit.gr/el/index.php?controller=product&token=0687827d206069ce6434a4facc2e24f3&id_product=16918&id_customization=0&group[24]=1519&group[23]=2643&qty=1

The same product English Language not working
https://www.stickit.gr/en/product?token=0687827d206069ce6434a4facc2e24f3&id_product=16918&id_customization=0&group[24]=1519&group[23]=1518&qty=1

Additionnal information
PrestaShop version: 1.7.5.2
PHP version: 7.0.33
Nginx 1.10.3
Friendy URL module ( remove ids from products enabled) from Mypresta( He is not responding to Suport requests...)

Warehouse theme ( I use it for years , it was never a problem)

Thanks!

Edited July 6, 2019 by siomosp (see edit history)