Mapper fails to solve choose-when from rest-response

Summary:

Hi

Could anyone assist me with mapper logic. We need to download publicly available information (https://api.eksport.mattilsynet.no/kodeverk/v1/country-certificates) and read some of the information from that json based on countryCode condition (the respons has information about all countries)

I`ve done the logic for-each, so it can go through all the elements in response (one per country code) and then choose-when to actually find the right set of data. However it fails to pass the check and map the data properly

Content (please ensure you mask any confidential information):

Integration mockup is like this for that get url