Please note that we've updated the Mount & Blade II: Bannerlord save file system which requires you to take certain steps in order for your save files to be compatible with e1.7.1 and any later updates. You can find the instructions here.
And in those days the empire of the Cyrodiils was dead, save in memory only, for through war and slug famine and iniquitous rulers, the west split from the east and Colovia's estrangement lasted some four hundreds of years. And the earth was sick with this sundering. Once-worthy western kings, of Anvil and Sarchal, of Falkreath and Delodiil