[Online subsystem] The steam subsystem does not work in the builded version, any reason why?

In the video it is possible to see that i can find and create sessions in the editor, but when i build the project and test it does not work, any clue on this?

Thanks everyone that can help!!!

"At build.cs

PublicDependencyModuleNames.AddRange(new string[] { “OnlineSubsystem”, “OnlineSubsystemUtils” });

 DynamicallyLoadedModuleNames.Add("OnlineSubsystemSteam");

at Server.Target

public MyGameServerTarget(TargetInfo Target) { Type = TargetType.Server; bUsesSteam = true; }"

With this now it works!