I use followed script to build client version, but it failed.
BuildPipeline.PushAssetDependencies(); // menu
BuildPipeline.BuildPlayer(new string[ ] {“Assets/Game Designer/Menu/Menu.unity”}, assetRoot + “WebPlayer.unity3d”, BuildTarget.WebPlayer, BuildOptions.BuildAdditionalStreamedScenes);
Debug.Log(“Finished building Menu web player”);
BuildPipeline.PopAssetDependencies();