Go the gradebook. In the top left there is a drop down of pages you can move to. Depending on what option you select sometimes nothing happens.
As a teacher I can visit the user of overview report for example but once there selecting Gradebook doesnt take me back to the gradebook.
As a student there are only two options available. User report and Overview report. User report seems to work as expected but Overview report does not.
Both Gradebook for teachers and Overview report to students are the first clickable item in the dropdown which may be a clue.