Trainers often conflict with the game's extensive modding system. If you see an "Internal Error" after trying to use a trainer, follow these steps:
Arma Reforger is still in early access/active development. Bohemia Interactive frequently updates the game executable ( ArmaReforger.exe ). Most trainers rely on specific memory offsets. When the game updates, these offsets shift, causing the trainer to fail. Arma Reforger Trainer Fix
Many trainers require you to launch the game through the trainer’s own "Play" button to bypass the launcher. Trainers often conflict with the game's extensive modding