Problem in auth, 404 there is no page

Partner Discussions
1

When running shopify app dev with a Remix-based embedded app and clicking the preview link (e.g., /admin/oauth/redirect_from_cli?...), Shopify attempts to redirect to the embedded admin app view at:

bash

CopyEdit

https://admin.shopify.com/store/{store-name}/apps/{app-handle}

However, if the app is not yet installed, instead of prompting the merchant with the install authorization screen (OAuth), Shopify directly opens the embedded app iframe, expecting a valid session.

In this case, the app fails to load and the admin displays:

“There’s no page at this address”

This occurs because the app was not installed, and no valid session exists, but Shopify proceeds to open the embedded app anyway — expecting that session handling and redirection to the /auth install flow will be triggered.

However, in the Remix app, the OAuth handler authenticate.admin(request) returns an HTTP 302 redirect response to /auth, which must be thrown or returned directly from the loader.

The issue arises when this response is caught and returned as data in a try/catch block — Remix does not treat it as a redirect, so the browser receives no install prompt, and Shopify ends up rendering a blank iframe in the admin.

As a result:

  • OAuth never completes
  • The app is not installed
  • Shopify can’t load the embedded app → leading to a 404 error inside admin

This is caused entirely by improper redirect handling in the Remix loader logic.

2

Hey @Ramesh_Bissu , is this the same issue reported here: There's no page at this address

and here: Error in app jsx while authenticate

If so, let’s keep the communication to a single thread. Since Dylan is already assisting on the oldest thread, I’m going to solve these others and we can continue there.