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.
What GIVES ?! This is literally the best aspect of multiplayer. Revert the change!
Edit: Vote here tototooooo https://forums.taleworlds.com/index.php?threads/suggestion-bugfix-re-enable-command-spam-in-multiplayer.416190/