We have received reports that multiple customers are stuck at this screen.
This seems to be a connection issue. Our servers are operating fine.
Please tell your customers to try WiFi connection, or mobile network. Alternatively, use a VPN.
If this problem continues we will try alternative solutions after our technical team wakes up.
Most users don't have any problems.
Also you can try this method for current time :
just open the game then it will stuck so turn off the data or best turn on airplane mode then wait a few second
after that turn off airplane mode
and the game will start normal