First of all thanks a lot for replying. Here is a bit more detail.
As I mentioned above that I have used the PHP Symfony framework for the installation of the app.
The app is hosted on Ubuntu 16 with apache. The app installed successfully after installation when I click the app from apps section it shows me above.
As Shopify documentation says you have to use Shopify Ap Bridge So I am using the CDN version and this is the only code I have used so far:
<script src="https://unpkg.com/@shopify/app-bridge"></script>
<script>
var AppBridge = window['app-bridge'];
var Actions = window['app-bridge'].actions;
var createApp = AppBridge.default;
var app = createApp({
apiKey: '{{ shopify_api_key }}',
shopOrigin: 'https://{{ store.storeUrl }}',
});
</script>
There is only simple HTML displaying on the home page of the app.
Sorry for the massive delay @umairdev , this thread escaped me when we migrated forums engines I believe. Is this an ongoing issue for you? Your code from your example seems valid, so I’d be interested to see what the issue might turn out to be.