Usually, such a message appears if you are using an unstable internet connection.

Please check your internet speed at any resource that measures Internet connection speed, for example, SpeedTest. The standard speed for playing mobile games online is 2 Mbps +

In this case, please, make the following recommendations:

1. Change your internet connection (switch from Wi-Fi to mobile internet or vice versa)
2. Reboot your device and router

If none of the recommendations above was helpful, please contact our support team using this link and describe the situation, specify when the problem occurred and what happened before the error message appeared.