I'm hoping someone out there has seen this problem before and has a simple solution for it.
I'm running a recent 1.9.9+ build of Moodle, with the most recent Attendance module. In some of my courses, when I click on the "Create multiple sessions" checkbox, those options stay greyed out, and can't be modified. However, it works fine in other courses on the same server!
I've looked as closely as I know how to the courses that work and those that don't, and haven't been able to work out what is different between them.
I've tried different browsers, I've tried lots of different options within the class (in terms of start and end dates or weekly vs. topic format), but nothing seems to make a difference.
Thanks for any ideas you can offer!