I've run into this problem before, and it's always resolved itself when I quit to menu, or sometimes I'd have to quit to desktop. It's been a few hours and a few restarts later though and I still get errors when entering a car, accessing hood or trunk, or pressing V standing next to vehicle. The HUD for the dashboard, repair menu, and vehicle action scrollwheels won't open at all. I'm wondering if there's anything I can do to fix this? I started a new game and ran until I found a car, was able to see the HUD and drove it so it seems specific to my main save.
I really love what you all are doing here by the way, thank you for this game. This game is a dream to fans of the genre, truly something special.