Purpose
This article explains what to do if a Read Only error occurs while trying to grade.
Procedure
If this error appears when trying to grade Turnitin papers, follow the steps listed below:
Enter into the Turnitin activity, click on the pencil icon next to Due Date, and change the date to a future year.
Click away from the due date setting so that it will auto-save.
Return to your course page.
Re-enter the activity and change the year back to what it is supposed to be.
Allow it to update that change.
Exit the Turnitin activity again.
Return to the activity and try grading the papers again.
If it doesn’t solve the problem, contact the Moodle team.