I'm building a shopify extension block app, refer to a code snipped below, I'm trying to open up the link that is the value of redirectUrl, I've followed the documentation here https://shopify.dev/docs/api/app-bridge/previous-versions/actions/navigat...

I still seem to be getting a Cors error, something do to with the preflight not being able to be redirected

I have an app block that I'm testing in a test development store, I'm trying to make a simple fetch call to my external backend application but I keep encountering a cors error: Access to fetch at 'my-backend-request' from origin 'https://extensions....