Welcome to the Auth0 Community!
I understand you encountered the Unauthorized error when calling the /continue endpoint after a redirect Action.
After my research, I found that this error happens when the state passed to the /continue endpoint does not match the initial state.
In your HAR file, I can confirm that the state passed was:
state=EpvWQ48ypYx4YIorsAGvZClggl8qkG7J8iZzKE87u5E
And was expecting:
state=hKFo2SBrRnlkU0RtMmxpampqYTNibWExMEFsMmNzNm1WWmRhR6FuqHJlZGlyZWN0o3RpZNkgeHFiVlZ4U204TVJjamJ2S2NjcVc2Q0RSYVNWdW43ZkOjY2lk2SB0c0lrS21jQlVTU3lIdmRybkJBUVZNQklRcG9SM3N4Vw
With that, could you please ensure that the state you pass back to the /continue endpoint is the one you see appended to the end of the Redirect URL?
I am looking forward to your update.
Thanks,
Rueben