Failed to take screenshot

Whenever I try to take a screenshot using the F8 key I get the message “Failed to take screenshot.” This happens on all cores. I am using the latest nightly version.

In settings > directory, is your screenshot directory set to somewhere user-writeable?

The directory is in my Documents folder. (Documents\Games\Emulation\RetroArch\screenshots) It was working before on version 1.7.3, (I hadn’t been playing for awhile.) Changing the directory doesn’t seem to change anything.