As well as the steps mentioned above, Please do try these in the meantime and let us know if it helps in any way:
-restart the application
-restart your device
-update the game
-update your device
-make sure you have enough storage to run the application
-make sure your device isn’t overheating
-connect to a strong WiFi/data connection
-make sure you have enough RAM (random access memory) on your device
-reinstall the application