Well then, if you are going to reinstall the game, after deleting the game, try to go into the folder of this game and delete the remnants so that you can install it cleanly later. Well, you can temporarily remove the Mount & Blade 2 Bannerlord folder from the document folders, where saves and configurations and settings for games and mods are stored. But in general, if you delete it, Steam will download them again through the cloud, if it doesn’t help, try choosing an older version of the game in the beta version in Steam in the game settings.