Please ensure that the group the learner is in has access to the sub-programme. Edit the Group and add the sub-programme to the available groups. You may have to add this to the parent group that this one is associated with first. Use the same process to add the sub-programme to the parent group and then repeat the process for the learner’s group:
FAQ: Why am I unable to select a sub-programme when editing a user’s programme details?
Faraaz Mohiuddin