B42 black screen and crash, some possible solutions.

1 - Unsubscribe from all your mods.

2 - Delete the "Zomboid" folder in: C:\Users\"Your username".

3 - Reinstall the game.

4 - Check the files via Steam.

5 - Open in windowed mode.

6 - Clear your video driver's shader cache.

7 - Update your video driver.

8 - Lower the graphics settings and disable the graphics settings of the video driver to avoid incompatibilities.

9 - Use alternate launcher. (In Steam: Properties > General > Boot Options selected)

Have a good game.