To correct this, navigate to:

  1. Core > User/Access > Profile > Search for the User
  2. Click into the User's Record
  3. Scroll down to System Information and Click Student Enrollment
  4. If the User has enrollment rows for the Current School Year, click Edit next to that Enrollment Row
  5. Mark the Checkbox for Student
  6. Click Save and Exit

If the User does not have Enrollment Rows see https://www.blackbaud.com/files/support/howto/coveo/k12/bb-core-enroll-individual-student.html