Laravel Echo not listening channel using beyondcode / laravel-websockets package

I have spent whole day on it can not figure out what is actual problem . When I trigger event it successfully push event to laravel websocket but when it comes to listening the channel it is not listening the channel.

I have run npm run watch Websocket server is running Jobs are also running. My laravel version is 5.8 and beyondcode/laravel-websockets version is 1.6

In my app.js file when I am listening channel here I think is a problem. I also try to console.log() in app.js but it is also not working . I included app.js file in my app.blade.js file like <script src="" ></script>

Here is my app.js file

/**
 * First we will load all of this project's JavaScript dependencies which
 * includes Vue and other libraries. It is a great starting point when
 * building robust, powerful web applications using Vue and Laravel.
 */

require('./bootstrap');

window.Vue = require('vue');

/**
 * The following block of code may be used to automatically register your
 * Vue components. It will recursively scan this directory for the Vue
 * components and automatically register them with their "basename".
 *
 * Eg. ./components/ExampleComponent.vue -> <example-component></example-component>
 */

// const files = require.context('./', true, /\.vue$/i);
// files.keys().map(key => Vue.component(key.split('/').pop().split('.')[0], files(key).default));

// Vue.component('example-component', require('./components/ExampleComponent.vue').default);

/**
 * Next, we will create a fresh Vue application instance and attach it to
 * the page. Then, you may begin adding components to this application
 * or customize the JavaScript scaffolding to fit your unique needs.
 */

const app = new Vue({
    el: '#app',
});

Echo.channel('PrintLabel') // Broadcast channel name
    .listen('.PrintLabel', (e) => { // Message name

        console.log(e); 

    }
    );
    console.log("Hello");
Pusher.logToConsole = true;

via Chebli Mohamed