The CORS request was responded to by the server with an HTTP redirect to a URL on a different origin than the original request, which is not permitted during CORS requests.
For example, if the page https://service.tld/fetchdata were requested, and the HTTP response is «301 Moved Permanently», «307 Temporary Redirect», or «308 Permanent Redirect» with a Location of https://anotherservice.net/getdata, the CORS request will fail in this manner.
To fix the problem, update your code to use the new URL as reported by the redirect, thereby avoiding the redirect.