Sometimes, antivirus software incorrectly flags trainer files as malicious (False Positive), deleting or isolating them. Add the trainer executable to your antivirus whitelist. Troubleshooting Advanced Trainer Issues in 2026
Never attempt to play the Arma Reforger Vanilla Trainer with mods enabled. Mods often break the scripted sequences. The "Trainer" is part of the core game data, not a mod scenario, but outdated mods inject bad data. Arma Reforger Trainer Fix
Scroll down to and click Add or remove exclusions . not a mod scenario