Here's what usually fixes it.

• Wrong email. Try the email address your Harrison invitation was sent to. It may differ from the one you use day to day.
• Forgotten password. Tap Forgot password on the sign-in screen and follow the emailed link. The link only works once and expires after [X minutes].
• Account not activated yet. If you never finished setting up your account, see Activating your Careplicity account.
• Too many attempts. After [X] failed tries your account locks for [X minutes] [confirm]. Wait, then try again or reset your password.
• Old app version. On mobile, update Careplicity from the App Store or Google Play.

Tried all of these? Email [support address] with the device you're using (web, iPhone or Android). Please don't include health information.