There are more than two users that have this email assigned
Since Salesforce relies on Username as their uniqueness constraint, the same email address can be associated with multiple Salesforce accounts.
Rather than two active Ambition accounts using your email address, our system is recognizing that multiple Salesforce accounts utilize your email.
Resolve the Issue
Reach out to firstname.lastname@example.org.
The support team will be able to resolve the error and you will be able to reset passwords and log in as needed!