Invalid type returned by Astro page.

Route returned a RETURNED_VALUE. Only a Response can be returned from Astro files. (E03005)

What went wrong?

Only instances of Response can be returned inside Astro files.

---
return new Response(null, {
 status: 404,
 statusText: 'Not found'
});

// Alternatively, for redirects, Astro.redirect also returns an instance of Response
return Astro.redirect('/login');
---

See Also:

Response