by Robert Northcutt.
I am receiving the same 403 error message when I try to access Grades from the View Submissions page with the URL path: /sya/mod/assign/view.php?id=64&rownum=0&action=grader&userid=71. If I remove the "rownum=0" argument then all works as expected.
Note: If I go to Grades from the button on the Assignment page (see below) all works correctly as well (workaround for now). The URL that works is: sya/mod/assign/view.php?id=64&action=grader
