Here are some possible fixes for the Kernelbase.dll error but also a general approach to any errors that may occure.
Update Drivers
Make sure all of your GPU, audio, and network drivers are fully updated to their latest versions.
Update Windows
Check for any available Windows updates, including optional updates, and install them to ensure your system is running optimally.
Check Disk Health
Sometimes your DLL can be corrupted. To try to fix it. Do the following:
Open the command line (CMD) as Administrator
Input Dism /Online /Cleanup-Image /CheckHealth
After that is done input Dism /Online /Cleanup-Image /RestoreHealth
To finalize the process input sfc /scannow
Verify Game Files
Use Steam's built-in file integrity checker to ensure none of the game files for ETS2 are corrupted or missing.
Right-click ETS2 in your Steam Library
Click on Properties
Go to Installed Files
Click on Verify integrity of game files
Remove all Mods if you have any
Temporarily disable or remove any mods installed to see if they are causing conflicts with the game or TMP.
Try a different save profile
Load a different in-game profile to determine if the issue is related to a specific save file.
Launch TMP as Administrator
Right-click the TMP launcher and select "Run as administrator" to ensure the application has the required permissions.
Reinstall TMP
Uninstall the TMP launcher and then reinstall the latest version from the TMP website to ensure everything is up to date and doesn't cause any issues.
Follow this tutorial to do it correctly: https://truckersmp.com/knowledge-base/article/147
Reinstall ETS2
Completely uninstall ETS2 and then reinstall it through Steam to refresh the game’s files and settings.
Reinstall DirectX and Visual C++ Redistributions
Reinstall or update your DirectX and Visual C++ packages to ensure your system has all the necessary components for TMP and ETS2 to run smoothly.
In case you have any telemetry mods like Trucky, Truckerhub, MS2, dBus, etc.
Remove your ETS2 plugins folder
Navigate to your ETS2 plugins folder ([Your ETS2 Steam Installation Location]/Euro Truck Simulator 2\bin\win_x64\plugins) and temporarily move it out of the Folder to like your desktop.
To check if they cause any issues.
If they are the issue then try to move one back at a time to find the culprit and send the dedicated software an bug report.
If all of that fails
Download the Correct DLL Version
Go to https://www.dll-files.com/kernelbase.dll.html.
Download the version that matches your system architecture (e.g., x64 for 64-bit systems).
To check your architecture
Right-click the Start menu in the bottom-left corner.
Click on System.
Look for Systemtype. it will tell you if your system is 64-bit or 32-bit.
Backup the Existing DLL
Before replacing the DLL, navigate to your C:\Windows\System32 folder.
Locate the old kernelbase.dll file and make a backup (copy it to a safe location).
Replace the Old DLL
After backing up the old file, copy the new kernelbase.dll file you downloaded into the C:\Windows\System32 folder, replacing the old one. This might need Administrator privileges.
Reboot Your System
After replacing the file, reboot your computer to ensure the changes take effect.
Related TMP forum topics:
Related SCS forum posts:
https://forum.scssoft.com/viewtopic.php?t=326503
https://forum.scssoft.com/viewtopic.php?t=323813
https://forum.scssoft.com/viewtopic.php?t=332669
https://forum.scssoft.com/viewtopic.php?t=327179
https://forum.scssoft.com/viewtopic.php?t=334321
https://forum.scssoft.com/viewtopic.php?t=325946
https://forum.scssoft.com/viewtopic.php?t=280434
Some possible causes of the issue:
You ran out of Memory
You ran out of GPU-Memory
You didn't use an updated GPU driver
You used an outdated or corrupted mod
Windows somehow corrupted a file (Yes this can randomly happen)
The game files got corrupted during an update or installation
The system is missing or has damaged DirectX or Visual C++ redistributable
There is a conflict with antivirus or security software blocking certain files
Overclocked hardware (GPU, CPU, or RAM) is causing instability
The Windows page file (virtual memory) is too small or disabled