I had this happen to me today, everything was fine exited game to go do something else came back a few hours later now it won't load any DLC (Even vanilla ones from MP) or Addons.

Title is pretty much it, doesn't matter which car. When I respray I can see a flicker of the color I want it to be then it goes to black. Doesn't matter the car, I tried Benny's, I tried a trainer, I tried Meenyos, Simple, and LSC. Nothing works.