IBM Watson Conversation API: “Request header field Authorization is not allowed by Access-Control-Allow-Headers in preflight response”

Question

I created a React-Native app that connected to the Watson REST APIs. Using the fetch library that is part of the ReactNative, everything was working well for getting the Workspa

Answer 1

The browser is refusing to send your request because the server you're sending the request to hasn't enabled CORS, at least not with those headers.

The only solution without modifying the server you're targeting is to write your own server that makes the request on behalf of the client.