Most mods built for v1.40 work on v1.41, but mods for v1.42+ will break the game. Use mods dated around June–September 2021.
To keep v1.41 from updating, set the game’s update settings to “Only update this game when I launch it” – but always launch the game from the .exe file directly, not through Steam’s green “Play” button.
Why this method works: You get clean, uncorrupted files directly from Valve’s servers. No cracks, no malware, and full compatibility with all your mods.
Fix: Install DirectX 9.0c runtime. Even if you have DirectX 12, older versions of ETS2 require legacy DirectX files. Download from Microsoft’s official website.