If you are having issues creating an account or logging in, please make sure you have the latest version of HER from the Playstore or the App Store. You can access those here:
If you are still unable to login or create an account and you DO meet the authentication criteria firstname.lastname@example.org
Also, include a Screenshot of what you are seeing and screenshot of any alert box that is displaying
We can not review your issue unless you send us all of the above pieces of information so we can accurately locate your account.