There was a patch for this game today, that probably broke the trainer.
Please use the update notification system to report a game patch, update or to report that the trainer may not be working with the latest version of the game. If 3 or more reports have been filed, consider BOOSTING the priority of this title for a faster turnaround on the updated trainer.
I was merely telling users that came to the comment section to see if there was a workaround that there wasn't one. (I was one of the 2 update reports before I posted)
Read the instructions maybe?
Let me quote them for you.
"STEAM MUST BE IN OFFLINE MODE
SINGLE PLAYER ONLY
ACTIVATE TRAINER ONCE IN GAME, NOT AT MAIN MENU"
[Edited by DragonStryder, 1/8/2021 8:42:57 AM]
Have both these .NET CORE and FRAMEWORK Installed from Microsoft.
.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
(Both x86 and x64 of the .Net Core MUST be installed)
Reboot PC when done.
Redo and repair them if you already have all of these.