Oauth with Oracle IDP not working

Summary

Getting 401 on finished OAuth

Content

I have problem running OAuth against Oracle Identity Service. I created a Confidential app (see the attached image) as instructed and configured Authentication service in ODA, see the attached image.

I managed to get the access token using Postman.However, when using ODA, even though I got:

Authentication successful! You can return to the conversation

on the login page, the component inside ODA returns an error saying:

Error returned from remote identity provider, AuthenticationService name: OracleIDP, http status code: 401, error response:

The flow:

metadata:
  platformVersion: "1.1"
main: true
name: oracleoauth
context:
  variables:
    token: "string"
    iResult: "nlpresult"