ReferenceError: opConfig is not defined on product page with custom options

[adamnicholls85]

We have a store that is running Magento CE 1.9.3.1 and we have a product that has custom options.  On the product page when you select one of the custom options, the price does not update, and you are unable to add the product to the cart.  I checked the browser console and the following error message comes up whenever you click on the radio button.

ReferenceError: opConfig is not defined

Here is the link if anyone wants to take a look: https://www.airqualitysolutions.com/honeywell-popup2025-pleated-popup-20-x-25-x-6-filter-media-repla...

Any ideas on how to fix this? I've been doing some googling before posting this but I can't really seem to find a solution.

[Damian Culotta]

Hi @adamnicholls85,

Can you try using the RWD theme? The idea is to understand if the problem is on some module or your theme.

It seems there is a javascript error:

[adamnicholls85]

Yeah it definitely seems like a Javascript error.  I tried switching over to the rwd theme on my local copy of the site and we're having the same issue.

[Damian Culotta]

Hi @adamnicholls85,

So maybe there is a module adding some block or javascript file that generates de error?