When using the SelfRegistration workflow, a new security setting must be disabled for newly created Firebase projects

[SchneiderInfosystems]

Important hint for all application which uses the unit FB4D.SelfRegistrationFra (both FMX/VCL version)

In newly created Firebase projects, a new security check has been installed by default in the authentication settings under UserAction, which hinders the self-registration workflow. This problem also occurs if the self-registration workflow is not used by passing AllowSelfRegistration=false in TFraSelfRegistration.Initialize.

The error occurs within TFirebaseAuthentication.OnFetchProvidersResp by raising the exception EFirebaseAuthentication.Create('JSON field registered missing').
This occurs because the FetchProvidersForEMail method does not return any valid data as long as this new security check is active.

Fortunately, there is a simple workaround. This new security check can be switched off in the Firebase Console under Authentication>UserActions>EMail enumeration protection:

[SchneiderInfosystems]

If have added this information to the wiki: https://github.com/SchneiderInfosystems/FB4D/wiki/Self-Registration-Workflow#disable-the-email-enumeration-protection-within-the-firebase-console-before-using-this-workflow