cart is not reloading

-- HikaShop version -- : 3.3.0
-- Joomla version -- : 3.8.5
-- PHP version -- : 7.1.1
-- Browser(s) name and version -- : FF
-- Error-message(debug-mod must be tuned on) -- : no error

Hi, I'm working on a template from joomshaper (politist) which is running with hikashop. I have a bug on my cart module : If I add a product, the cart tells me "you're cart is empty". If I reload the page or go to another page, the product that I added shows up in my cart.
I c'an't give you any url, the site is still on my local machine + the demo version of the template works just fine unlike the quickstart package...
nb : I tried to use only the native hikashop files (no overloads from the template and same ting happens it seems.
Is there anything I can do?
Thanks.

ok, nevermind, there was a cart.php overload file that was bugging. Problem solved.
Thanks anyways