There are several things that can be done to try and help the gaming experience.

1. Ensure you have Wifi and/or data connected to the device.

2. Try turning Mobile Data / Wifi OFF and then ON again

3. Try restarting the game completely (full shutdown and restart)

4. Try restarting your device (reboot after 30 seconds)

5. Check if there are any firewalls applied to your Wifi that may be blocking the game to use the network properly

6. Check the game with Mobile data if it works fine

7. Resetting the device network:

iOS - Go to Settings > Choose General > Reset > click Reset Network Settings > Turn off WiFi network > Turn off iPhone > reboot iPhone and WiFi network.