Hi Rob!
I've downloaded v27 and am playing it - LOVE all the new features, it's like a new experience all over again.
However, I got stuck with a consistent CTD during the enemy turn at turn 132 (on Marathon - the world was between Anno Incepti and Anno Aeris), so I used IGE (Ingame Editor) to delete possible culprit civs from the game - and I found it! It happened during the Lusitani turn, and removing their cities from the game (therefore removing the player) fixed the CTD. I have ruled out production (no buildings were about to finish), so I believe it most likely to be an issue with a Lusitani-specific decision, should there be one available at that point in the game [Edit: There is not, at least not according to the XML file with the text, so it's gotta be something else, maybe not Lusitani-specific at all but rather a generic event/decision that could happen to any AI].
Unfortunately I haven't the slightest clue how to navigate the E&D part of the mod, so I have no idea where to even try to start fixing the problem.
Is there a chance you might look into this and maybe upload another hotfix if you find what's wrong?
For now I'll keep playing with one less enemy civ and see if I get stuck again later. Will let you know if any other such issues arise.
Cheers,
Unedjis
Edit: When playing as Lusitani, there are no issues. Might not be specific to that civ after all. Also, haven't had any more crashes since the report.