I recently get some kind of random error which although rarely happened, it just hinder me from take next step in modding Extended Cultures.

When I run autogame by ai and observe it, sometime, in middle of game, game just close itself without any warning or message say about anything. When loading autosave, game still able to continue like normal, so I could not reproducing this error and check for cause of problem.

What could be possible causes for this error?