Help with errors (Total War: Rome)

I have such trouble. Once again I decided to go through a career for the Julii, but in the game I realized that the last level of the palace (huge_city) was gone, that is, it reaches 24 thousand inhabitants and that's it, it's not built further. Ie, accordingly, I cannot purchase the first cohort, the city cohort. there are no required buildings. Help me. Already worn out by the pritorians and triarii with Egyptian chariots to fight