Updated to latest package, pre-fixing.

Assets/Scripts/Infrastructure/LogHandler.cs

 using System;
-using System.Collections.Generic;
-using RelayException = Unity.Services.Relay.Http.HttpException;
-using LobbyException = Unity.Services.Lobbies.Http.HttpException;
 using UnityEngine;
 using UnityEngine.Events;
 using Object = UnityEngine.Object;

Packages/manifest.json

     "com.unity.nuget.newtonsoft-json": "2.0.0",
     "com.unity.services.authentication": "1.0.0-pre.4",
     "com.unity.services.core": "1.0.0",
-    "com.unity.services.lobby": "1.0.0-pre.2",
+    "com.unity.services.lobby": "1.0.0-pre.3",
     "com.unity.services.relay": "1.0.0-preview.1",
     "com.unity.sysroot.linux-x86_64": "0.1.15-preview",
     "com.unity.test-framework": "1.1.27",

Packages/packages-lock.json

       "url": "https://artifactory.prd.cds.internal.unity3d.com/artifactory/api/npm/upm-candidates"
     },
     "com.unity.services.lobby": {
-      "version": "1.0.0-pre.2",
+      "version": "1.0.0-pre.3",
-        "com.unity.services.core": "1.1.0-pre.4",
+        "com.unity.services.core": "1.1.0-pre.8",
-        "com.unity.nuget.newtonsoft-json": "2.0.0"
+        "com.unity.nuget.newtonsoft-json": "2.0.0",
+        "com.unity.services.authentication": "1.0.0-pre.3"
       },
       "url": "https://artifactory.prd.cds.internal.unity3d.com/artifactory/api/npm/upm-candidates"
     },

ProjectSettings/ProjectSettings.asset

     m_VersionName: 
   apiCompatibilityLevel: 6
   activeInputHandler: 0
-  cloudProjectId: 
+  cloudProjectId: 0bf0426b-e1fd-4251-82d0-3eea033ef1ad
-  projectName: 
-  organizationId: 
+  projectName: com.unity.services.samples.lobby-rooms
+  organizationId: operate-samples
   cloudEnabled: 0
   legacyClampBlendShapeWeights: 0
   virtualTexturingSupportEnabled: 0