I have read the FAQ, I have dutifully activated the script on every load. I have searched the forum too, without much success.

I am playing the Romani, and I have conquered all of Sicily and the Italian penisula up to the Alps. It is 239 BC. I have "Polybian era" markers in my cities (next to the "Camilian era" marker), but I cannot recruit Polybian era units. And I cannot build any "Polybian barracks". Is there something else I need to do?

For example, do I need to destroy my "Camilian barracks"? If yes, all of them, in every one of my cities? I have destroyed a couple but can now only rebuild the lowest level "Camilian barrack" in its place.

Thankful for any help, that would contribute to make my Saturday night more satisfying ;)