Prompt is null in request. Please put `prompt: "login"` in command, so `authorization_url` should looks as
```
https://gluu.catapultlearning.com/oxauth/seam/resource/restv1/oxauth/authorize?response_type=code&client_id=@!850F.12EB.67F3.F5DE!0001!3EE2.8AFA!0008!43B2.E3D9&redirect_uri=https://qa.owlforlearning.com/walkthrough/api/opclient/landingpage&scope=openid+email+uma_protection+uma_authorization&state=ge79f3ntul5afd3mnjh54nl698&nonce=skl73jo9sderkh1km4r67aumqb&prompt=login
```
Also you may wish to attach logs as file attachment instead of inline.