Thanks for checking on that! Since we can rule out an error connecting to the API, the issue will be with how the data is being pulled.
Have you been able to check this call in Postman to see if it works there as you have it set up? My familiarity with Ximilar is none but the likely place where this has gone wrong is in the nested value records[1].best_label.name Is that the correct property? When the value returned is null that means there is a lack of any value and so I would check the JSON to see if this is correct.
There is a great topic on how to parse JSON here: API JSON Tutorial (Video)