Could not proxy request /pusher/auth from localhost:3000 to http://localhost:5000 (ECONNREFUSED)

I am trying to create a chat app using reactJS and pusher, i am getting this error-

Could not proxy request /pusher/auth from localhost:3000 to http://localhost:5000 (ECONNREFUSED)

in package.json file i have set proxy as-

"proxy": "http://localhost:5000"

and my localhost is defined as 127.0.0.1 in /etc/hosts file.
I have also checked for the port availability using netstat, but these all seems to be correct. Can anybody help?

I had a same problem in my React App and I fixed it by just adding "/" after the port number in package.json file (so now it's: "proxy": "http://localhost:5000/")

I faced a similar issue but in Mac machine. I changed localhost to 127.0.0.1 and that worked for me.

For windows:

"proxy": {
  "/auth/google": {
    "target": "localhost:5000"
  }
}

For Mac:

"proxy": {
  "/auth/google": {
    "target": "http://127.0.0.1:5000"
  }
}