@ynixon For Ubuntu (just guessing that you are using it) follow those instrcutions https://forums.fogproject.org/topic/10006/ubuntu-is-fog-s-enemy
If you are not using Ubuntu I ask you to open a new topic and let us know all your specs (Linux OS and version, FOG version, exact error (picture!) and so on).
@anthonyhull This thread is about the error message when capturing an image. Please open a new topic and post all your details including a picture of the exact error on screen.