Download both the .apk file and the .zip or .obb file. Do not open the APK yet.
If you are determined to follow the "APK + OBB" path, remember: --- Euro Truck Simulator 2 Android Download Apk Obb
That means the OBB file is missing or the APK is trying to call home to Google Play. You need to install Lucky Patcher (a root-level tool) or find a "pre-patched" APK. However, this requires root access on modern Android versions (12+). Download both the