"Rank Up" problem
I had earned enough stars to go from a 54 rank to a 55 rank. A treasure chest came up and when I clicked on it the very next window appeared as a blank white screen with a check mark, the screen appeared frozen, and would not allow me to click on the check mark to move ahead. I have restarted the game many times with each time having the same result. The "rank up" always comes up first thing without allowing me into any other part of the game. Any suggestions on how to fix this would be appreciated.