The system pulls the Family Directory information off of the Student role. In order to print the Family Directory, the Student role must be displayed in the Directory. 
  1. Navigate to Core > Content > Directories
  2. Click the Edit icon for the Directory
  3. Click on the Roles tab
  4. Select +Roles
  5. Expand the Student Persona
  6. Mark the check box for Student
  7. Click Apply