http://localhost:port/sockjs-node/info?t=1572376464617 Error on vuejs

http://localhost:port/sockjs-node/info?t=1572376464617

error on vue.js :

check vue.config.js file


on dev server (triggers during npm run dev) :

// set port and host
const port = ur_dev_port
const host = ur_dev_ip


check devServer: {

port: port
host: host

}