unsupported_response_type

OAuth (Sign in with Tickwire): only response_type=code is supported (shown on the sign-in error page).

HTTP 400.

Likely cause: The app used the implicit flow or another response type.

What to do: Use response_type=code with PKCE (S256).

Retry: No. The same request gets the same answer; change something first.

Listed under Sign in with Tickwire (OAuth) in Errors. Send the error’s requestId to support and we can find the request.