No 'Access-Control-Allow-Origin' header is present on the requested resource. If an opaque response serves your needs,
Just got a solution to an error which I was facing for the last 2 days, It was really a bit mistake which I was doing but now resolved, I was trying to send a SMS from Twilio API // const app = express(); const express = require('express'); app.use(cors()); <<<<< // if you just comment on this above line you get the same error mentioned below, I have set upped react server/website on 3000 port and express server on 4000 port. so the website sends a post request running on 3000 port to the server on port 4000 mechanisms called cross-origin request. // Access to fetch at 'http://localhost:4000/api/send-sms' from origin 'http://localhost:3000' has been blocked by CORS policy: Response to preflight request doesn't pass access control check: No 'Access-Control-Allow-Origin' header is present on the requested resource. If an opaque response serves your needs, set the request's mode to 'no-cors' to fetch the resource with CO...