This will only work for Workshop items that the server downloads itself, that are listed in the [OnlineSubsystemSteamworks.TWWorkshopSteamworks] section of your server's ROEngine.ini
- Make sure that the server is not running. If it is running, the Workshop setup will be overridden the next time you restart the server.
- Find the section [IpDrv.TcpNetDriver] in the ROEngine.ini config file.
- Add the line "DownloadManagers=OnlineSubsystemSteamworks.TWWorkshopSteamworks" to that section.
If there are other "DownloadManagers=" lines, make sure this one is the first. - Do not delete anything from this section, except (optionally) other DownloadManagers= lines.