Hi,
In that case you need to keep this plugin enabled.
However, if the cart module is not updating it means that either:
- You're using the default cart module of HikaShop but customized based on an old version of the module which doesn't work with the new add to cart system. So you would have to rename the file templates/YOUR_TEMPLATE/html/com_hikashop/product/cart.php and it should then work with the default look of the cart module. And you'll then have to recustomize the cart module view file.
- You're not using the default cart module of HikaShop. In that case, you need to either contact the developer who provided this module so that you can get an updated version of the module, compatible with the new add to cart system, or disable that cart module and use instead the default cart module of HikaShop.