You don't have one of the main files in your Euro Truck Simulator 2 install folder.Did you do anything to it?The path is (Name of harddrive)\SteamLibrary\steamapps\common\Euro Truck Simulator 2\bin\win_x64.Just go to your Steam Library,Click on Euro Truck Simulator 2 with the right button,click on properties,local files and click on Vertify Integrity Of Game Files.Wait for the scan to complete and then wait again for the download to complete.Hope this helps!