Update Cart Issue

I just installed HikaShop and transfered items over from Virtuemart. However, when I try to add a product to my cart " tallyrg.com/store/product/updatecart " it comes up with a 404 Not Found. Not sure what I'm doing wrong and would appreciate some guidance. Thanks!

I have the same problem on my site at www.minmg.net . Adding to the cart gives me a popup with 404 - Page no found. Despite this, the cart is actually updated and works as expected. I put joomla in debug mode and this is the output in the popup with the error message:

# Function Location
1 JSite->dispatch() JROOT/index.php:42
2 JComponentHelper::renderComponent() JROOT/includes/application.php:198
3 JComponentHelper::executeComponent() JROOT/libraries/joomla/application/component/helper.php:357
4 require_once() JROOT/libraries/joomla/application/component/helper.php:388
5 JError::raiseError() JROOT/components/com_hikashop/hikashop.php:43
6 JError::raise() JROOT/libraries/joomla/error/error.php:251

I turned off the SEF and it did help. Now, the popup confirms item put into the cart, and provides link to checkout and continue shopping. Great advice! Thanks!! However....
I´m still concerned for the SEF being turned off. What are the consequences for the site? It still seems like a bug - will it be fixed in an upcoming release?