Js error when adding to cart.

ISSUE: 

When adding to cart, it doesn't add the products to the cart straight away. You have to go back to the home page.

Or: 

You're encountering this issue: 

Or: 

SOLUTION: 

Please add this patch to fix it: 

https://drive.google.com/file/d/1GBwEJ36Iejg8FLOgJ21zY85HP_8D1Pwi/view