Right-click the trainer and select "Run as Administrator."
If you want to play Horizon Arcade or race with friends online later, close the game completely, close the trainer, and restart the game fresh without the modifications active. Troubleshooting Common Issues Trainer Game Version Mismatch forza horizon 5 trainer fling verified
Assuming you find a legitimate, verified version for the current patch, here are the features typically included: Right-click the trainer and select "Run as Administrator