After having a quick look, and an attempt at copying the game myself, it seems that your game is timing out on when attempting to copy. This is primarily due to the sizable amount of character sheets present in the game (838 in total). Character sheets are typically the largest source of data bloat in a game. My only suggestion at this time is to see what you can do about trimming that down before you copy. Other than that, manual copying may be the best solution for you. The Transmogrifier tool might be handy in quickly transferring over data as you need if you would like to go that route.