This issue is known to occur if you have changed the clock on your device since installing the game. Please ensure the clock on your device is set correctly; this may fix your problem. If that does not work, please try fully closing your app, as this can fix this issue.

To fully close an app, follow these steps:
  1. Open your Android "settings" menu
  2. Select the "Applications" or "Apps" option. The exact wording will depend on your device
  3. Tap "Manage Applications".
  4. Select "Running" at the top of your Manage Applications window.
  5. View your list of running applications.
  6. Select the app that you want to close and tap the "Stop" button to fully close the app.

If it does not solve your problem, I'm afraid there's nothing else we can do. The only solutions are to wait for the gas timer to count down to 0, which it will do eventually, or to pay 2 gold to refill your gas task, which often resets players' timers. To prevent this issue from happening again, please refrain from changing the clock unnecessarily in the future.