I've tried following the postman tutorial located at Tutorials | Refinitiv Developers , but cannot get an access token. The appkey generator seems to work fine, but when I try the Authorize step in said tutorial I receive:
"error_description": "Invalid Application Credential."
This is now resolved. It seems there is quite a bit of change between the version of postman used in the tutorial and the latest version. For example, ACCESS_TOKEN seems like it needs to be local to the Collection, not part of an Environment. The post query Tests are not working as expected e,g, dynamically passing the ACCESS_TOKEN from json to the Postman variable is not working.
Have you worked through the Quick Start | Refinitiv Developers to ensure you have valid credentials such as MachineID, long password - as well as the AppKey? And did you select EDP API checkbox when creating your AppKey?