Amazon authentication and integration

I’m building a bubble app which requires integration with Amazon. I’ve to set up the OAuth2 authentication before I can make API calls. But I’m running into issues during this authentication process. I set the workflow to open an external website and go to this destination “https://www.amazon.com/ap/oa?client_id=YOUR_CLIENT_ID&scope=sellingpartnerapi::orders&response_type=code&redirect_uri=https://your-app.bubbleapps.io/api/1.1/wf/oauth_redirect&state=abc123” according to the documentation. Unfortunately, I get an error that says the following

If anyone has successfully done this, I’ll be really grateful for any assistance you can provide. Thank you