Fix for oauth authorization

Editor assessment

The subject names the affected flow: OAuth authorization was failing in the editor. The fix type and scope are accurate. The body adds the actual cause — a credentials response type check rejected the authorization response — which converts a vague-sounding headline into an explained mechanism, exactly what a one-line body should do. The PR reference is well-formed. Hygiene is clean, with the slightly informal Fix for opener permitted. A good example of a compact bugfix message where the body identifies the faulty logic rather than echoing the subject.