Data Action REST call returning 204 but variables stay empty

Architect & Flows
1

I’m trying to map a JSON response from an external API into Architect variables using a Data Action, but the variables aren’t populating even though the request returns a 204.

Here’s the mapping config:

{
 "responseMapping": {
 "statusCode": "{{statusCode}}",
 "body": "{{responseBody}}",
 "headers": {
 "Content-Type": "application/json"
 }
 },
 "variables": {
 "customerStatus": "{{responseBody.status}}",
 "lastInteraction": "{{responseBody.lastInteraction}}"
 }
}

The external endpoint logs show it’s sending back {"status": "active", "lastInteraction": "2023-10-27"}. Why is the Data Action failing to parse the body into the variables?