Shopping Cart Page Fatal Error

Hi,

When I try to view the cart page, I got this error
Fatal error: Cannot use object of type stdClass as array in /opt/lampp/htdocs/tentmakerph_a/wp-content/plugins/ready-ecommerce/modules/user/views/cart.php on line 15.

Any help regarding these. Thanks

https://www.ads-software.com/plugins/ready-ecommerce/