Have you tried to reinstall (or re-update) the game ? It's possible that the update was somehow interrupted or incomplete. However, if you were logged in during your whole previous gameplay, your progress should be saved, so if you uninstall the game or change your device, all your current stuff (money, gold, cars, etc.) will be returned right after you log in. I don't know how it actually works with iOs (because I have an Android app logged in with Google account) but I guess there's no big difference. I hope you'll fix the problem soon and continue with your hard work.
