Invalid web redirect url

I am implementing Apple Sign-In for a multi-platform application, specifically for the web component using the REST API flow.

I am encountering an invalid_request Invalid web redirect url error when attempting to use a newly registered redirect URL.

Here are the details:

1. Original Test URL: I initially registered a redirect URL, let's call it [Your Original Test Redirect URL, e.g., https://test.yourdomain.com/auth/callback], for testing purposes. This URL worked correctly.

2. New Service URL: I then registered a second redirect URL, [Your New Service Redirect URL, e.g., https://www.yourdomain.com/auth/callback], intended for my production service. This URL was registered approximately 5 days ago (including the weekend).

3. The Problem: The new service URL ([Your New Service Redirect URL]) is still not working and consistently returns the invalid_request Invalid web redirect url error.

4. Puzzling Behavior: Furthermore, I have since deleted the original test URL ([Your Original Test Redirect URL]) from the Service ID configuration in the Apple Developer portal. However, the deleted test URL still appears to function correctly when I use it.

This situation is highly confusing: The newly registered URL is not working after 5 days, while the URL I have deleted from the configuration is still operational.

The Service ID in question is [Your Service ID, e.g., com.yourdomain.service].

Could you please investigate why the new redirect URL ([Your New Service Redirect URL]) is not becoming active and is returning the invalid_request error, and also explain why the deleted URL ([Your Original Test Redirect URL]) remains functional?

Any guidance or assistance you can provide to resolve this issue with the new URL would be greatly appreciated. Thank you for your time and support.

Sincerely,