I get 404 error when I click on add to cart

-- url of the page with the problem -- :http://shawarmahouse1.com/
-- HikaShop version -- :HikaShop Starter: 2.3.0
-- Joomla version -- :3.2
-- PHP version -- :5.3
-- Browser(s) name and version -- : chrome, firefox, IE
-- Error-message(debug-mod must be tuned on) -- : Error:404 The requested page cannot be found.

Hi, when I click on add to cart I get the 404 error. I was searching for this in your forum and there was something I found about SEF may cause this problem. I have little knowledge on joomla and SEF and so far my knowledge there is no issue with SEF. Can you please have a look.
Here is the url again: shawarmahouse1.com/
shawarmahouse1.com/administrator
user: mohsin
pass: mohsin

Thank you very much
Mohsin

Hi, just now I noticed, sometime it works and most of the time I get 404 error.

Hello Mohsin,
Note that when I use that link it's working fine : shawarmahouse1.com/index.php?option=com_...kout=1&product_id=42
Can you disable your sef module and try it again ?
Thanks.

yes, without SEF url it works. But I cant run the site without SEF url, what is your suggestion.

Thank you.

Hi,
Actually we can't see any errors, thanks to turn back on the SEF in order to test and see the result.

Now no errors. Without SEF it works fine. But when I make SEF enable the problem occurs. In my first message I said, I dont have any problem in SEF. All other pages work fine. Just this hikashop checkout gets error and this is the problem that I am writing here. And its strange, sometimes its works and sometimes not !

Thank you very much for your support.

Hi,

Had you changed the value of the option "Checkout SEF name" in Configuration > Features > SEF url options ?

I am having the same problem:
renaissanceartscenter.org/courses/summer-arts-institute/week-4
click add to cart and it goe to error 404 page..
please help

I never did..but found a workaround. I have another issue-

When I add to cart now and it goes into the cart on the right module its fine, however if I click the "x" to remove I get an error page.
How do I correct that?
try here
renaissanceartscenter.org/courses/summer...beautiful-bounty-5-7

Hello,
I just tested it and when I remove the only product that is on your cart, I'm redirected on the "Courses" page and have the "Cart is empty" message.