I have one simple product in that related products tab i have added 8 products. i can see that products in bottom of this product detail page with checkbox like select all product to add to card.

While select only one or not select any product simply add only main product to cart these time got this error.

please check image: related product


  • This is because we are passing qty of that product when you add this product check what data you are sending and check Qty specifically. – Shubham Khandelwal Oct 12 '18 at 8:50

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