You or the skin has managed to collapse the media library navigation tree so it's not visible leaving the last shown media library view that was selected.
Move the mouse over the vertical bar to the left of the name column & that should change to a left-right mouse cursor along with the line changing colour which can be dragged to the right by clicking & moving the mouse.
Then you can select the history node which should show what's been played subject to how that mode is configured & if what's played meets those settings.
