Hi Everyone,

As many of you, me and my friends had the same problem with loading a sandbox game.
We have all the DLC, but it should work also with the basic edition.
You have to start a new game!!

If you have already enabled Cloud-Storage see step 4

1) Open Xbox360 Dashboard.
2) Go to the SETTINGS-tab followed by System Settings -> Memory.
3) Enable Cloud-Storage

4) Start your game
5) Hit a button to start the game.
6) Not to fast, and select by storage-device "cloud".
7) Play the game

8) When you want to exit the game, do it on this way:
9) Press start -> Save Game
10) When the game is saved, choose Main Menu from the same menu.
11) Wait untill your main menu is fully loaded (no icon in top right corner)
12) Xbox guide button -> Open dashboard.

I was able to load the game on this way more then 4 times in a row, without a freeze ect..

Let me know if it works for you.