Please try these steps, they usually help to resolve most connectivity problems:

- Make sure your Wi-Fi network is stable and password-protected.
- Close any background apps.
- Power off your device for a couple of minutes.
If the steps above don't help, then if you have connected your profile to a social network then you can uninstall and reinstall the game completely. When reloading, you can sign into your social network again to easily recover your account.

If this still does not resolve the issue, then please reach out to Customer Care within the game's Settings menu.