Mount and Blade II Bannerlord/Modules/Native/AssetPackages
directory to delete previously added files and after that verify the Bannerlord installation through steam.XCrosshair_1.tpac
to delete to fix the issue).Did you try the new parameters (add_map_to_usable_maps) mentioned here https://moddocs.bannerlord.com/multiplayer/hosting_server/#mission-options-require-mission-restart
I assume that these are the server which ran with the beta and Taleworlds will turn them off soon. Probably unintended I guess.