SUPEE-9767 issue : Add to cart issue (Magento 1.9.0.1)

Question

Right after applying the SUPEE-9767 patch on our Magento 1.9.0.1 site, every time when I try to put a product to cart by clicking the Add to cart button on the product page, I get the following errors (partavaahto.html is the product url):

TypeError: element.attachEvent is not a function

bf802dc...e879.js (line 5653, col 9)

TypeError: Mage is undefined

partavaahto.html (line 40, col 1)

TypeError: Translate is not a constructor

partavaahto.html (line 52, col 26)

TypeError: element.attachEvent is not a function

bf802dc...e879.js (line 5653, col 9)

TypeError: Product is undefined

partavaahto.html (line 221, col 9)

ReferenceError: VarienForm is not defined

partavaahto.html (line 347, col 17)

TypeError: Mage is undefined

partavaahto.html (line 431, col 9)

TypeError: element.dispatchEvent is not a function

bf802dc...e879.js (line 5734, col 7) 4

detailed error: TypeError: productAddToCartForm is undefined

Strangely, on the category listing page Add to cart button still works fine.

I have applied all the previous security patches and they have worked without errors.

Any idea what could cause this and how could it be fixed?

Answer 1

According to the following js file name: bf802dc...e879.js it seems like you have merged and minified js/css files enabled.

Depending if it's done via the Magento out of the box or via an extension. In both cases I suggest you refresh the cache that generates those JS/CSS files as it could be the reason why you're getting JS errors