Empty cart after adding a product

Hello,

We have a issue with our store, we use Enfold + WooCommerce.

For example, in incognito mode in https://magazinuldestoma.ro/product/manusi-nepudrate-din-latex-safetec-unigloves-100-de-bucati/ page, if we select S variation, click on add to cart and go to the cart page, the cart is empty.

We tried the following:

– deactivated all our plugins
– deleted from Tools all the Transients, customer sessions
– reinstalled wordpress
– recreate cart page

We also contacted the hosting to check if is an issue with the cache on their site, they refreshed the cache but the issue is still here.

Can you help us?

Thanks.