Hey Lia, I saw this thread about a similar issue in IIQ, Message: java.net.SocketException: Connection reset, HTTP Error Code: 0
Another thing which might be worth looking into is seeing if any of the auto generated headers in Postman is missing in the call which ISC is making. Not sure about the Socket Exception but i have had similar issues where the API call wasnt working in ISC because of some missing header which is usually auto generated in Postman