Error invalid_client when generating tokens at /oauth/token in 3scale

Solution Verified - Updated -


  • User receives a 401 Unauthorized error with message {"error":"invalid_client"} while trying to generate an OAuth access token by calling /oauth/token endpoint exposed on the gateway, while the credentials are correct


  • Red Hat 3scale API Management Platform
    • SaaS
  • OAuth implementation on the gateway uses the templates from nginx-oauth-templates repository
  • A metric with previous traffic on it, was disabled in the application plan associated to the application credentials

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