An email address can only be associated with one blackbaud.com account.  If you receive this error, a blackbaud.com account has already been created with the specific email address.

Request the Blackbaud.com password email for the specific email address.

If using a Google account, click Sign in with Google on the Sign in page and try to log in with your Google credentials.  If you need to reset your password, click Forgot password? and follow the prompts.