One of the types of ads on Facebook is Carousel Ads. They consist of a carousel in the 2-5 images and/or videos, titles and references, or calls to action in one advertisement.
At this point, OWOX BI does not support the full functionality of this type of ads. The main reason for that is the ability to mark each of the carousel items by different UTM tags. This complicates the process of cost allocation in the ad/campaign when imported into Google Analytics.
However, if all the elements contain the same links that match the main link, the import will take place normally.