This error message appears when an incorrect password or an unknown email address is entered. Please use the password you used during registration. If you do not remember the password, you can reset it.
Also, make sure that you use the email address you provided during the registration process and the one where you typically receive emails from Hrmony (e.g., reminders or monthly summaries). In most cases, this is your work email address. You can find information on how to change your email address in this article.