Ever since I updated iPhoto, I can't change my desktop background
Ever since I updated my iPhoto to "Photos 1.0", I can't change my desktop background. It will change to any of the apple presets, but none of my personal photos. If i try to export any of my photos to the desktop, i get an "Could not load image (1,019)" every time. I just want to know how to fix it.
MacBook Pro, OS X Yosemite (10.10.3), Photos Version 1.0