Can't add a product to the cart (PS1.7.4.2)

[DARKF3D3]

I have a strange problem on my website.

There's a product that can't be added to the cart, when the add to cart button it's clicked it show modal cart popup with no product informations showed, and if you click on go to checkout the cart it's empty.

This happen only with this specific product, all the other products works correctly.

It's a standard product like all the others, i double checked all the setting of this product and I can't find any difference with the others.

[PrestaHeroes USA]

enable PS debug mode (1.7 via peformance page) and see if any errors.

also on chrome use inspector and check console for errors.

note: for best help provide link to product that has add to cart issue...

[DARKF3D3]

Debug mode it's enable but no error it's showed.

On Google Chrome Console I see only this alert, but the same it's showed also on other products that works correctly:

[Violation] Added non-passive event listener to a scroll-blocking <some> event. Consider marking event handler as 'passive' to make the page more responsive. See <URL>
[Violation] Forced reflow while executing JavaScript took 44ms

 

The website it's a private website I'm using for tests, if needed I can send you credential to view front office via PM.