Hi Calvin,
Please check the follow up control options for your course type or for the entire LSO in the IMG (SPRO) transaction.
IMG Path:
Training and Event managmeent -> SAP Learing Solution -> Training Managmeent ->Recurring Actvities ->Follow-up ->Control of Process steps
Make sure you have the followup step for Learing Portal. I hope this helps.
Regards,
Supriya