Problem solved, one of the guests bought the course, but the field with the name and surname in the LMS was left empty, which made the purchased course available to every unregistered guest. Maybe this information will help to fix this problem when uupdatingpdating the add-on.problem solved, one of the guests bought the course, but the field with the name and surname in the LMS was left empty, which made the purchased course available to every unregistered guest. Maybe this information will help to fix this problem when updating the add-on.