I can create a monthly fee and assign it to students with the Student Billing Premium module. However, after I have created and assigned the fee and even set the "assigned" and "due" date to today, the fee is not applied to the students.
When looking at the indiviudal student's fees, the fee has not been added. Additionally, the student balances have not changed.
I could also reproduce this problem with the Student Billing Premium module in the online demo. Same effect there: a fee can be assigned but it does not have an effect on the student balances.
How can I get the monthly fees to work?