It looks like you're basing your mappings on json snippets. That doesn't work in version 7.15.1 (it will work in 7.16)
Looking at your mapping, it looks like using a message definition to base your mapping on would be a lot easier, and it works in 7.15.1
can you show us the microflow you use for the specific operation? if you use an object or list to return in your microflow please show us the import mapping and message definition as well. Maybe there is something missing
Hi Pim,
Thank you for your response, I am working with Sophie
Please see the Microflow used below, the import mapping, the message definition and the Published REST page