For people who installed the latest version 1.122, in this version there seems to be an online authentication check. If you leave your wifi on the game will just crash and you won't be able to run it again unless you delete it completely.
The way to get around it is after you sideload the 1.122 version of the game, turn off wifi, start up the game, click on thank you, then click on sign in. When it prompts you to sign in you turn the wifi back on, refresh the menu and get the login screen. Once the login is complete you turn off the wifi again and you're able to play. And at this point you cannot close the app again because if you do, you need to do this Wifi trick again or it'll crash and you're forced to delete the game.
This sucks because in 1.120 this wasn't a problem. I think this problem started sometime in 1.121 or 1.122.