When a Teacher is submitting Grades for students, they see the error "Oops! A value for Grade must be selected for all students.". This article provides a solution for fixing this issue.
This error appears when a checked student's Grade field is left blank. All checked students must receive a grade.
Make sure that all the students who have a grade have been checked. If there are students who should not receive a grade, uncheck them and leave the Grade field blank.
The error message is no longer seen after inputting grades for all checked students.