A little change in two saves but only one works.
I have 2 saves on the same map one that works (for me):
the great wall_20180312142219
the great wall_20180312142219.meta
and one that doesn't (made very little progress in game):
the great wall_20180312191710.meta
It gave me this image:
I can't find the crash report (I think):
Also on the map I can't place the character Suvius Magnanimous (there are 2 of them in my prison) in a torture device but I managed to put her in prison by building a prison on her otherwise minions seemed to ignore her. Was this on perpose?
Suvius shouldn't be able to be imprisoned afaik, that's probably what has caused this error to occur.