An Authentication Error typically means you need to register for an account.
If you are a PARTICIPANT, please press the "Create new account" button under the top Log In button.
If you are a SUPERVISOR, please search your email inbox for an Email with Subject line :
ACTION REQUIRED: Transportation Incentive Program (TIP).
This email contains a long link that will enable you to register as a supervisor.
If you do not have the email, please contact your Local Reviewing Official or TIP POC
and ask them to send it to you again via "Email Supervisor" button.