There is no option to close a project and leave feedback. Its says its in a revision state. When searching the topic the same issue is happening to others.
The project must be delivered before you can review/close.
Are you a buyer? If so, your seller must deliver the order. If they’ve already delivered, they must deliver again.
Are you a seller? If so, you must deliver your order before the order can be completed and feedback left. If you’ve already delivered, you must deliver again.