Rails Shopify App Bridge Error: s {name: "AppBridgeError", message: "APP::ERROR::INVALID_CONFIG: ...

23 2 8


I am creating a Shopify app using Ruby on Rails. Actually, I want to use Shopify Toasts for my App. For this purpose, I am following this guide https://shopify.dev/apps/tools/app-bridge/getting-started#embed-your-app-in-the-shopify-admin . 

But Unable to make it work when I check in the console everything looks fine then this error comes up.




s {name: "AppBridgeError", message: "APP::ERROR::INVALID_CONFIG: host must be provided", action: undefined, type: "APP::ERROR::INVALID_CONFIG", stack: "AppBridgeError: APP::ERROR::INVALID_CONFIG: host must be provided"}




If anyone had this issue please help me resolve this. I am creating a Ruby on Rails Shopify app not React. 

Host, shopOrigin everything I am providing like this:

var AppBridge = window['app-bridge'];
var actions = window['app-bridge'].actions;
var createApp = AppBridge.default;
var app = createApp({
apiKey: 'f558d070d3f8e1b0ba4c25cd633e3d6c',
shopOrigin: 'https://<%= Shop.last.shopify_domain%>',

var TitleBar = actions.TitleBar;
var Button = actions.Button;
var Redirect = actions.Redirect;
var breadcrumb = Button.create(app, { label: 'My breadcrumb' });
breadcrumb.subscribe(Button.Action.CLICKfunction() {
app.dispatch(Redirect.toApp({ path: '/breadcrumb-link' }));

var titleBarOptions = {
title: 'My page title',
breadcrumbs: breadcrumb

var myTitleBar = TitleBar.create(apptitleBarOptions);
P.S: The above code is for creating buttons in the navigation menu and this is also not working. 
I Will be waiting for support, Thanks
Reply 1 (1)

Shopify Staff
15 4 4

Hi @Arhum ,

Sorry you're running into this! With App Bridge 2.0 we require the a host key rather than the shopOrigin in the initialization config. We've updated the docs here.

var app = createApp({
    apiKey: <api_key>,
    host: <host>,

You can retrieve the host from the application URL query params

Hopefully, this helps!

To learn more visit the Shopify Help Center or the Community Blog.