Access to XMLHttpRequest at ‘http://127.0.0.1:3000/socket.io/?EIO=3&transport=polling&t=OyAd7iL’ from origin ‘http://127.0.0.1:8080’ has been blocked by CORS policy: No ‘Access-Control-Allow-Origin’ header is present on the requested resource.
GET http://127.0.0.1:3000/socket.io/?EIO=3&transport=polling&t=OyAd7iL net::ERR_FAILED 400 (Bad Request)