I've successfully implemented user authentication using AWS Amplify, however - I cannot enable my app in production because I receive a "Broken URL Detected" error message.
This is because the Website responds with a 400 Bad request, the site URL I'm using is described in these documents:
How can I enable my application? The Site URL itself should be valid and has been previously working.
Can you explain more on how u get that error? May be can you provide screenshot/screencast?
I get that error when I click on the switch to move my App from "In development" to "Production". This site doesn't have the ability to attach images but there's a grab of the error modal that appears here: https://ibb.co/3mQFN6T
Facebook is trying to crawl the site but I believe the Cognito user pool has some required query string parameters which is why a 400 bad request is returned.
There's a disconnect between Amplify / Facebook.
We had something similar with Android. We did remove the Android platform, switched to Live and added the Android platform again. Hopefully something similar does the job for you too.