because after 5.2.2 version , if you log in game and try to connect fb , it will show you black screen .In normal situation you have to down load fb app in google play, you will get error issue when you open OG game.
SO this is the solution,after you download normal game app on phone and log in game and change places to save game,you have to download 5.2.2 version go mod connect fb and ignore update message and log in game , then close your game.After you do this , you have to download new update version 7.4.0 and click your cursor and pull the 7.4.0 go mod apk to screen and cover original game app and then you can log in game.
Importantly , you guys shouldn't uninstall go game , if you did that someone say you will get big problem about your orginal game save.
why it happened ? Because the new creature expendition activity beta version some guys like us don't get this beta version and JC not doing their job to let the bug happen, that why we get the dumb error issue.
Forgive my poor English