Romans-> error in the Scripting that starts at the turn of 246 BC Summer-246 BC Winter. it forces it to the year of 14 AD. this ends a couple of turns later with the script returning the year back to about 244 BC This bug is known for causing an instant defeat for not acheiving the greatness of Augustus.

To fix this bug, just save before the bug begins, reload the saved game, and don't activate the EB Scripts until you are safely past the error.