Why is the 'Unique Adds to Cart' column on Meta Ads empty?

[bobesneakers]

Hey everyone, 

Does anyone know why some of the columns in the screenshot are empty?

As you can see, I have both "Adds to cart", and "Purchases", so I can't seem to find out why, for example, the "Unique Adds to Cart" is empty.

I understand that "Adds to cart" talks about items and "Unique Adds to Cart" talks about clients, but I don't understand why the second one would be empty since, logically, if there's any number in the first column there should be at least a 1 (client) in the second.

Thanks in advance for any help you can provide.

[mrtylmz]

having the same problem , there are lots of people asking this question all over the reddit and this forum. there is still no answer.