Level Editor Fatal Error and Blackbox

[joey1245]

I've seen this covered before in other threads, but none of the answers were working for me. Whenever I open Amnesia or its level editor, it'll either pop up with a FATAL ERROR message or a Blackbox message. No matter what I do, or who I get help from, it still won't work! Both the game and the editor worked until about a day after I got the level editor working. Please help if you can.