by Mary Cooch.
Hello there. First, I found a bug relating to this here MDL-44821 but you seem to have already tried creating a new course and category. Which School demo course is it - is it one with just one activity? Are you restoring it with the admin role or the teacher role? Because if you have given yourself the teacher role within the course then you will need to give yourself the teacher role in the new course iin the new category as well. However, again if you are using the admin role throughout, then that shouldn't be an issue. See also MDL-35494