WordPress installed in sub-folder of domain disables cart

I have installed wordpress in a sub-folder in the domain here https://perrito.dk/site/ and installed and configured the plugin there. Everything worked.
Now that the site has moved to production, I have pointed wordpress to the root of the domain, but now the cart won’t update. I can add as many items as I want but the cart won’t remember them.
Can you help me?

https://www.ads-software.com/plugins/wp-e-commerce/