Just logged in today and had a notification pop up to update the Pre-cards, so I went into settings to do this but it was stuck at 100% for a while.

After waiting a bit I decided to restart the game to see if it could refresh this but it instead broke the whole game when I started the application again. (Included a screenshot of the aftereffect)

I will try to reinstall the game from scratch but I think this is an issue that should be fixed if possible.