You need to have the Reports > All Users Task List site permission to view the report. See User and Roles.
The All Users Task List report generates a list of users' tasks at the site.
At the site level, select Reports from the left navigation menu.
In the Tasks section of the Reports page, select All Users Task List.
By default, the report will display all users' tasks with the deadline set to today's date.
Use the Filter by options to change or add to your filtering selections to obtain the needed data.
You can choose to group the report data by selecting by adding a Group by option.
- You can Sort by deadline, assigned by, assigned date, assigned to, completion date, overdue (days), status, target, or type.
How to use the filter by, group by and sort by functions
- Select Generate Preview.