When I try to manually insert a grade in Grades > Grader Report, and after clicking "UPDATE", the grade disappears.
I have already updated to the latest version of Moodle - 1.9.10+ (Build: 20110125), tried checking and optimizing tables, but still not working.
Evan as an Admin, I cannot insert grades mannualy in Grader Report.
Can anyone tell me what might be the problem?