FATAL ERROR: Could not load world file 'maps/main/50>'

[plutomaniac]

Hello, I know it's been almost a week but I think I know what's wrong now.

1. Right-click on the game title under the Library in Steam and select Properties.
2. Under the General tab click the Set launch options... button.
3. Make sure it's empty. Most probably it says -xxx50 or similar now.