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re-install these and reboot.

.NET Core 3.1 Desktop Runtime x86 Link
.NET Core 3.1 Desktop Runtime x64 Link
.NET Core Current Runtime x86 Link
.NET Core Current Runtime x64 Link
.NET Framework (get latest) Link

If it still fails check it has not been flagged by any security software, remove it from quarantine or set to allow. Then add exclusions to trainer and C:\Users\USERNAMEHERE\Cheathappens\Work

If still no go then run SFC
Link

[Edited by CyPHeR369, 5/15/2021 8:30:56 PM]

Completed those steps, still no go. Ran SFC and it found no integrity violations.

Is it running the task manager? Maybe it is off screen. I would need to see whats happening. A support ticket would be the next step.

What AntiVirus/security are you running?

[Edited by CyPHeR369, 5/15/2021 10:30:46 PM]

You can see it hit Task Manager for a moment and then the app crashes and it disappears from Task Manager, that's why I went to Event Viewer to confirm the crash was happening. Event Viewer doesn't log anything on my PC when a trainer successfully opens, just when it crashes.

The only AV I have is Defender.

May need an earlier version of .NET Core 3.1 desktop runtime. All can be found here.

dotnet.microsoft.com/download/dotnet/3.1

Start with 3.1.11 and work up, x86 and x64.

Wiped everything for .NET and tested each group after reboot (x86 and x64)

3.11 - appcrash on launch
3.12 - appcrash on launch
3.13 - WORKED, closed and re-opened the trainer 3 times to be sure, then played a game session for an hour with no issues - rebooted my computer and now it appcrashes on launch again.
3.14 - appcrash on launch

3.15 - appcrash on launch

Wiped everything again, reinstalled 3.13, trainer cleaner, fresh trainer, and now appcrash on launch again. I just can't get anything consistently working with the newer trainers.

[Edited by IanBadeer, 5/17/2021 11:02:06 PM]

Run this

How to use the System File Checker

Link

Completed, no integrity violations found.