I completed the This is Forza Motorsport 7 challenge, but when I went to the forzathon tab to claim the mustang, a network error message popped up, and I didn’t receive the card for the car. I checked the garage, and the Mustang wasn’t there. I restarted the game, car wasn’t there. I rebooted my console, car still wasn’t there. I was able to complete the Clean Sweep challenge and get the Nissan.
This is Forza Motorsport 7 challenge completed.
Still no mustang reward after waiting 24 hours.