[pgailinas]

Problem occurs for any product I have configured to have variants.

The functionality seems to work fine when I am on a Product Details page. On that page, I can select different variants and the SKU and color changes appropriately. I can add the product variant to the cart fine. I can then go to the cart and, if I want, check out fine. However, when I go to the cart and select "Change attributes", a pop-up appears where I can select the new attribute from a drop-down. So far, so good. Now, the problem occurs when I select the CHANGE button to apply the variant change. At that time, I get an error message "Product with selected attribute value(s) is not available or out of stock. Please select other."

As described above, product is in stock and can be selected fine on the Product Details page. Issue seems to occur on the Cart page.