Too bad! 
The infamous SAVEGAME bug within custom campaign mode is still existing.
Even after several patches of the new 2.0 version of the game.
It already has been posted during the last months (and even years!) for several times now. It was highly expected to be getting fixed in version 2.0 of the game, but sadly it wasn’t…
THE PROBLEM: Pick a custom campaign of your choice and try to save either by pressing F6 or using the normal save function. The game will instant crash.
The weird thing is that some people doesn’t face that problem, others do.
So please, dear developers, can you finally hunt down this sneaky bug?