Hi there!
Can you show me the versions of the EliMZ Book and the Face window plugin?
Viewing post in Hakuen Studio Face Window for RPG Maker MV MZ comments
Did you set up the Face Window positions on the plugin parameter, on the three different positions?
If yes, make sure the minimap is not in the same position as the face window.
If it is still not showing, press F12/F8, go to the CONSOLE tab on the window that will appear, and send a screenshot of that window so I can see if there is any error there.