unfortunately the game crashes while loading. I don't know whether it's the vehicle mod or obfuscate.

Edit:
I use the newest version for 1.16.1 and forge Version ...101.

I found the problem myself. The Vehicle Mod is incompatible with the Optiforge Mod. I used the mod together with Forge 32.0.108 and OptiForge V.1.0.8. It always crashes. It works without Optiforge, but doesn't seem to work too well with Optifine either.