Please follow the steps below to resolve the not able to log in issue as follows:
Go to the Core module and search for the employee.
Click the Email tab.
Amend the email that can be used.
Note: Set the default ePortal login password
ePortal: A new employee cannot log in to ePortal for the first time
User is asked to change the new password and the page hangs, user is being routed back to default password.