This section does require specific permissions, which are detailed here: User Roles and Permissions
Project requests are actions that show approval stages in the payment process. The detail here will be populated as payment requests are submitted by Suppliers and then approved or disputed by Clients. If there is an outstanding action required by your organisation as part of this process, it will appear on the Tasks section. Just click the Tasks tab to view the action required.
If you have the required permissions, you will also be able to see the request history. Click anywhere on the Request line and a new pop-up will open showing the history of the request:
This will allow you to track which user has carried out what action.