After Patch Game Hangs on Black Screen During Startup

Tried reinstalling, updating drivers, validating files, even deleting COD documents folder. Nothing so far works.

Every time I start the game after the latest patch, COD gets to downloading blueprints, then hangs on a black screen while the sound of clicking a button repeats. Never crashes; just hangs there. No idea what's causing it. Does anyone else have this or, better yet, a solution?