Load balancer does not have available server for client

const Eureka = require('eureka-js-client').Eureka;
const express = require('express');
const server = express();
server.use(express.json());
server.use(function(req, res, next) {
    res.header("Access-Control-Allow-Origin", "*");
    res.header("Access-Control-Allow-Headers", "Origin, X-Requested-With, Content-Type, Accept");
    next();
});
server.listen(3001);
server.get('/demo3', function (req, res) {
    res.send("CIaooo");
});



// example configuration
const client = new Eureka({
    // application instance information
    instance: {
        app: 'MS3',
        instanceId: 'MS3',
        hostName: 'localhost',
        ipAddr: '127.0.0.1',
        port:  {
            '$': 3001,
            '@enabled': 'true',
        },
        vipAddress: 'jq.test.something.com',
        statusPageUrl: 'http://localhost:3001/demo3',
        dataCenterInfo:  {
            '@class': 'com.netflix.appinfo.InstanceInfo$DefaultDataCenterInfo',
            name: 'MyOwn',
        },
        registerWithEureka: true,
        fetchRegistry: true
    },
    eureka: {
        // eureka server host / port
        host: 'localhost',
        port: 8761,
        servicePath: '/eureka/apps/'
    },
});

client.logger.level('debug');

client.start(function(error){
    console.log(error || 'complete')});

zuul:
  routes:
    demo3:
      path: /demo3/**
      serviceId: MS3 # registramos al microservicio
      stripPrefix: false
# Discovery Server Access
eureka:
  client:
    registerWithEureka: false
    serviceUrl:
      defaultZone: http://localhost:8761/eureka/
server:
  port: 8080   # HTTP (Tomcat) port

server:
  port: 8761
eureka:
  client:
    registerWithEureka: false
    fetchRegistry: false