Unfortunately, such problems may happen due to the lack of the system resources of the device or because of an unstable Internet-connection.
We understand that these issues may prevent players from getting a positive gaming experience and are doing our best to optimize the game and improve its overall performance.

You can try the following solutions, which may help to avoid most of the technical issues:
1. Free up device memory by closing all applications running in the background.
2. Reboot your device and try starting the game again.
3. Check if your device is using a reliable and secure connection (Wi-Fi or solid 3G/4G). If you are using only one connection method, try using another one.

Additional troubleshooting steps can be found in the following instructions:
- for Android devices
- for iOS devices