Today I loaded the saved game, and after some seconds, it ran into this:
Error
objects/Units/Unit.lua:294: attempt to index local 'structure' (a nil value)
Traceback
objects/Controllers/ErrorHandler.lua:65: in function 'handler'
objects/Units/Unit.lua:294: in function 'requestPathToStructure'
objects/Units/Miller.lua:252: in function 'update'
objects/Units/Miller.lua:306: in function 'animate'
objects/objects.lua:704: in function 'update'
states/game.lua:127: in function 'update'
main.lua:149: in function <main.lua:106>
[C]: in function 'xpcall'
I get always a blue crash, when I try to update the Keep to a Fortress in Campaign mode - Arms Race.