TSR: Server error on enrollment based pages for employees from admin level

1] Add a employee through API.
2] We are not passing DOB and Gender while adding employee through API.
3] Server error is observed for such employees on below pages:

Server Error on:
1] Admin Login>Manage Employee>Enroll Now - Life / LTD
2] Admin Login>Manage Employee>Select your plans

We also need to handle Core plan allocation routines in system when Gender / DOB for employee is not present.