I met all the objectives in Saqqara but it's not advancing to the next city.
population is 3808 (3500 needed)
culture 15 (0 needed)
prosperity 16 (but it was much higher) (15needed)
stepped pyramid built (13 needed)
kingdom 100 (50needed)

How do I advance?

edit: I found it on the steam forums. I had to go to the monument overseer and provide supplies to finish the monument.