Hi all, I've run my site for about 7 month using prestashop 1.5.6.1. Since my site run, some page can't be accessed when it run in single languages. The page that cannot run is all page that listed in SEO in back office like search, my-account, order-slip, etc. It can run well when I run my site in multi languages or I turned off the friendly URL. How can I fix that? Thanks before.