Connecting socket.io over https server

I am using electron js as client and created a nodejs server on port 3000 with my own signed https certificate. But when i tried to connect to my socket server from client using

io.connect("https://localhost:3000")

I am getting error as:-

ERR_INSECURE_RESPONSE

Please save my day.Thanks in advance!!!

Server side code

var apps = require("express")()
if (isUseHTTPs) {
  app = server.createServer(options, apps);
} else {
  app = server.createServer(apps);
}


const io = require('socket.io').listen(app)
io.sockets.on('connection',function(socket){
   socket.emit("getData",(data)=>{
         console.log(data);
    })
})

var options = {
  key: fs.readFileSync(path.join(__dirname, resolveURL('fake-keys/privatekey.pem'))),
  cert: fs.readFileSync(path.join(__dirname, resolveURL('fake-keys/certificate.pem')))
};

Basically i want to create a video or audio confrencing system but it requires https secured server so i cant use http

The problem probably is, that electron does not trust your certificates. Have a look here: https://stackoverflow.com/a/38989441/5133130