When I try to launch Forge 1.11.2-13.20.1.2588, it goes through mod setup completely fine, then crashes at the very last second. I've assured that all of the mods in the folder are for the proper version of the game (although I do need to pick up Optifine.) Any conceivable reason why this could be happening?
My full debug log can be found here.
Error stack trace:
Crash screen:
Screenshot of .jar files in the mods folder: