Preview window not going awat

[mpt-matthew]

😡
Opened preview window (space bar one), closed it, switched spaces, and it popped back up saying no items selected.
Click space to dismiss, then it popps back up when i switch space.
GRRRR!!!
😡😡😡😡😡

 

[tomfuertes]

Had the same issue; fixed by relaunching Finder through Force Quit:

Keyboard: Option+Command+Escape
Mouse: TopLeft Click Apple -> Force Quit