Clients Can’t connect

If clients are unable to connect, you may have stale data in your servers Engine.ini file.

UE4 servers may have lines like this in their INI. This can cause the server to think it’s on a different version of the game then clients and will reject their attempts to connect. Delete the bUseBuildIdOverride and BuildIdOverride lines and that should resolve the issue.

[OnlineSubsystem]
bUseBuildIdOverride=True
BuildIdOverride=460304166

Server not registering in server browser

If you’re using -MULTIHOME=<ip> you’ll need to also use -MULTIHOMEHTTP=<ip> in order to ensure the server issues it’s http requests from the same IP as the unreal server is running on.

Don’t rename mod pak files.

Also working on fixing this, but if you rename a mod pak file, it will fail to load.