When a user tries to log in using the /apply link, they do not receive the option to apply a child. This can be due to a disabled Role Task for their role. 

To edit the task:​​​​​​​
  1. Go to Core > Security
  2. Select Roles
  3. Click on the role Parent of Alumni
  4. Click Tasks
  5. Click Edit
  6. Mark Apply
  7. Click Save