Unable to get 200 response from an API when a request is sent from localhost:3000

When we submit a POST request from localhost:3000 to an API, we got message below in the browser develop console with Status: 404.

x 'Access to fetch at '<Invoke URL>' from origin 'http://localhost:3000' has been blocked by CORS policy: No 'Access-Control-Allow-Origin' header is present on the requested resource. If any opaque response serves your needs, set the request mode to 'no-cors' to fetch the resource with CORS disabled'. x POST <invoke URL' net::ERR_FAILED 404

But when we submit the request to the same API from Postman, we got 200 response.

Where could be the problem? Thanks.