902 error messages will appear when your device isn't able to connect to the Hempire server. This can happen when the server is particularly busy, usually if a lot of players are downloading a new update at the same time, or if your wireless signal is currently experiencing disruptions. Most 902 errors will resolve themselves after a few hours, so try connecting to Hempire again later and see if it works for you then.
If the problem persists for longer than a day then please contact our support team. (you can contact it from the loading screen by using the ( ? ) question mark icon in the top-right corner of the loading screen) Please include a detailed explanation of what is happening when you try to load the game.