Under Site Administration clicked on Users -> Accounts -> Browse Users and picked a student. A users branch is added to the navigation tree. Clicked on Users -> (user name) -> Activity reports -> Grades and got the following error.

Notice: Undefined index: 1 in /home/andrew/Desktop/repos/moodle/lib/grade/grade_item.php on line 1954
Call Stack

1. Time Memory Function Location
   1 0.0021 398376 {main}

   ( ) ../user.php:0
   2 0.9016 86617072 grade_report_user_profilereport( ) ../user.php:169
   3 0.9050 86676112 grade_report_user->fill_table( ) ../lib.php:502
   4 0.9050 86676112 grade_report_user->fill_table_recursive( ) ../lib.php:189
   5 0.9056 86682688 grade_report_user->fill_table_recursive( ) ../lib.php:360
   6 0.9077 86704544 grade_item->get_formatted_range( ) ../lib.php:335

The url is course/user.php?user=5&id=1&mode=grade