CORS not recognizing prefixed URL?

As I am working to connect my react-app with my node back-end, both using DO’s App Platform, I struggle with CORS. As I found out I need t make changes in app settings, done. My app now allows the origin “”, the URL of my react app.

- cors:
    - 'Authorization'
    - GET
    - POST
    - PUT
    - DELETE
    - prefix:

However, when making the request via I get the following error: “Cross-Origin Request Blocked: The Same Origin Policy disallows reading the remote resource at (Reason: CORS header ‘Access-Control-Allow-Origin’ missing).”

Is this normal due to limits or am I making a mistake? Because, I have checked this out, using Postman and two browser-based testers APIs are doing fine. That’s confusing.

Does anybody have an idea or solution for this? Would be great.

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Hi @bluecrunch,

The CORS configuration for your app specification looks correct. To troubleshoot this further could you please raise a support ticket with us and we will get back to you as soon as possible.

Cheers, Taha Fatima