1. To work properly, your device must meet the minimum technical requirements, including 2 GB of free RAM. On devices with less operating memory, the game is not guaranteed to work stably. Try to keep as few apps as possible on your phone and restart your device from time to time, so that the load on your device's operating memory is at a minimum when you launch the game.
2. Ensure that your account is synchronized with your Facebook account and follow these instructions:
Delete the game.
Restart your device.
Reinstall the game.
3. Your device should be running the latest version of its operating system. Check if there are updates available.