Oh wow i have found a fix for this:
This is from a user
Perverse Papaja on steam
this is what he said and it worked :
follow this in singleplayer:
here is a fix that works in 95% of all cases and keeps all safe games.
Without mods:
1.) Open Steam -> Library -> Mount and Blade Bannerlord
2.) right click on Bannerlord -> "properties"
3.) Select the "Updates" tab and uncheck "Steam Cloud Synchro ..."
4.) Open your documents (the Documents folder)
5.) Copy "Mount and Blade II Bannerlord" from Documents to your desktop
6.) Delete "Mount and Blade II Bannerlord" from your documents folder
7.) Start Mount and Blade 2 and exit it when you are in the main menu. (This must be done so that a new "Mount and Blade II Bannerlord" folder is created in your documents)
8.) Go to the folder that you have moved to the desktop and there you will find 4 folders.
Copy the folder "Game Saves" and paste it under "Documents" -> "Mount and Blade II Bannerlord". (ONLY the Game Saves folder!)
9.) Start the game again and you should now be able to play without any problems. Settings and so on must be set again
With mods (Vortex launcher)
1.) Open Steam -> Library -> Mount and Blade Bannerlord
2.) right click on Bannerlord -> "properties"
3.) Select the "Updates" tab and uncheck "Steam Cloud Synchro ..."
4.) Open your documents (the Documents folder)
5.) Copy "Mount and Blade II Bannerlord" from your documents folder to your desktop
6.) Delete "Mount and Blade II Bannerlord" from your documents
7.) Click on "Start" (or Windows key + r) and enter: "%appdata%"
8.) Go to the folder "Vortex" and then "plugins" and make sure that "plugins" is empty. If not, delete all files in the "Plugins" folder
9.) Start Mount and Blade 2 and exit it when you are in the main menu. (This must be done so that a new "Mount and Blade II Bannerlord" folder is created in your documents)
10.) Go to the folder that you have moved to the desktop and there you will find 4 folders. Copy the folder "Game Saves" and paste it under "Documents" -> "Mount and Blade II Bannerlord". (ONLY the Game Saves folder!)
11.) Start the launcher and select all mods.
(If you dont see your mods, You may have to install all mods again, just open Vortex, "load order" -> "Deploy mods" (left on top) - if you still don't see any mods in the launcher, go to "Vortex" on "mods" and choose for every Mod uninstall "and then reinstall it.)
Also check, if you have the latest versions of your mods
11.) Start the game again and you should now be able to play without any problems. Settings and so on must be set again