Screenshot, grab etc only takes pic of blank screen
On up to date MacBook Pro. I recently cleaned up my computer with MacKeeper and I think I must have deleted something that is needed for screenshots.
Hitting cmd, shift, 3 (or 4, and using the Grab utility, or screen capture from iMessage) takes a picture that does show up on my desktop with proper windows in it, but they are blank. I have tried restarting my computer, have tried to use the Grab utility, etc. all with same results.
I don't know what file I need to replace to fix this. Again, the screenshot DOES happen, but the windows are blank (but each window is there).
Help??
Jon
MacBook Pro, macOS High Sierra (10.13.4), Sierra 10.13.4