I am having the same issue.But im not using redux or smtg i just open the game with the add-on car (it doesnt need any other files to open the car mod i am using (same with other car mods) but game closes without any pop-up message on second screen (I installed this mod(s) some days ago and it didn'T wwork even at first time (21davy21's was working b4 mine isn't)