I'm receiving message" Error 12009 (iOS device)" what that suppose to mean?

It may be possible that you are using Cellular data and in this case please do kindly check the settings if your device allows Rogue Life to use the Cellular data. For this please go to your settings and choose Cellular, there should be a list of applications that are allowed to use the connection and when enabled the slider should light up with a green color. Please make sure that Rogue Life is allowed to use the connection then try to run the game after allowing the game to connect using Cellular data.