URGENT: Prices are not displayed — issue with Price Calculations

Hi Nicolas,

After updating to HikaShop 6.4.0, I’m facing a critical issue: on some product pages the price is not displayed on screen when the price depends on HikaShop – Price Calculations (price computed from custom fields such as width/height/quantity/shape).

What happens

The calculation is triggered (an XHR request returns HTTP 200), but the price never renders.

The browser console shows:

Uncaught TypeError: Cannot read properties of null (reading 'price')

Triggered inside the xhr.onreadystatechange callback (hikashop.js).

Technical evidence (Network/XHR)

In Network → XHR there is a request named calculate returning:

Response: No product id

And in Payload / Form data, only these parameters are sent:

{"cart_type":"cart","add":"1","ctrl":"product","task":"updatecart","return_url":"aHR0cHM6Ly93d3cuaGVybWFub3NnYWxpYW5vLmVzL2NvbXByYXIvZXRpcXVldGFzLXBlcnNvbmFsaXphZGFz"}

As you can see, product_id is not being sent.

DOM evidence

In Elements, I can see:

<span id="hikashop_product_id_main" class="hikashop_product_id_main"></span>

This span is empty (no ID inside), so the AJAX/calculation flow cannot retrieve the product_id and the request ends with “No product id”. Then the JS tries to read .price and crashes.

Important notes

This does not affect all products: it happens only on products where the price is calculated using Price Calculations with custom fields.

Products with a “normal” price (no calculation) are not affected.

Example URL

www.hermanosgaliano.es/comprar/etiquetas-personalizadas

Request

Could you please confirm if this is a regression in 6.4.0 and provide a patch?
It looks like the issue is that product_id is not injected into the DOM (or is not being read properly) when building the calculate/updatecart request.

Thank you in advance — this is urgent because it directly impacts conversions.

Best regards,
José Ángel
Hermanos Galiano

Thanks Nicolas.
It works fine.
Best regards.