Issue when creating the game through the full advanced create game flow

[llvieira]

There is a weird issue with L&S when creating the game through the full advanced create game flow (picking the gameplay template and immediately hitting play works). When you set up the L&S world and click to continue it shows a popup with a NullPointerException error message. It might be an issue where one of the other worlds in L&S has incompatibilities with the new create game flow.