marketpress add to cart button throws 404 error when user is not logged in!

Hi there,

I´m experiencing a strange error. when I´m logged in as a user I can add an item to the cart but when I´m not logged in it throws a 404 error. you can check yourself here: https://tabularasa-ny.com/store/products/sovereign-pillow-4/

error:

POST https://tabularasa-ny.com/tr/

404 Not Found

1.44s

jquery…r=1.7.2 (line 4)

“NetworkError: 404 Not Found – https://tabularasa-ny.com/tr/”