Applied suggestion by falko17.

The initialization of the ServerNetwork uses System.Lazy providing
lazy initialization.

We have temporarily disabled the download of the data from the backend.
This must be re-enabled when the backend is operational.

Assets/SEE/Net/ClientActionNetwork.cs

@@ -61,7 +61,7 @@ public void Start()
         {
             if (!IsServer && !IsHost)
             {
-                Network.ServerNetwork?.SyncFilesServerRpc();
+                Network.ServerNetwork.Value?.SyncFilesServerRpc();
             }
         }
 
@@ -115,7 +115,10 @@ public void SyncFilesClientRpc(string serverId, string backendDomain)
                 Directory.CreateDirectory(AbsoluteServerContentDirectory);
             }
             */
-            StartCoroutine(GetAllData());
+
+            // For the time being, we will not download the data.
+            // This must be re-enabled once the backend is ready.
+            // StartCoroutine(GetAllData());
         }
 
 
@@ -143,7 +146,7 @@ private IEnumerator GetAllData()
 
             UnzipSources();
 
-            Network.ServerNetwork?.SyncClientServerRpc(NetworkManager.Singleton.LocalClientId);
+            Network.ServerNetwork.Value?.SyncClientServerRpc(NetworkManager.Singleton.LocalClientId);
         }
 
         /// <summary>

Assets/SEE/Net/Network.cs

@@ -376,31 +376,27 @@ static void CheckArgumentValue(string[] arguments, int i, string argument)
         }
 
         /// <summary>
-        /// The <see cref="ServerActionNetwork"/> component attached to the server game object.
+        /// The gateway to the server.
         /// </summary>
-        private static ServerActionNetwork serverNetwork;
+        public static readonly Lazy<ServerActionNetwork> ServerNetwork = new(InitServerNetwork);
+
         /// <summary>
-        /// The gateway to the server.
+        /// Yields the <see cref="ServerActionNetwork"/> component attached to the Server game object.
         /// </summary>
-        public static ServerActionNetwork ServerNetwork
+        private static ServerActionNetwork InitServerNetwork()
         {
-            get
+            const string serverName = "Server";
+            GameObject server = GameObject.Find(serverName);
+            if (server != null)
             {
-                if (serverNetwork == null)
-                {
-                    const string serverName = "Server";
-                    GameObject server = GameObject.Find(serverName);
-                    if (server != null)
-                    {
-                        server.TryGetComponentOrLog(out serverNetwork);
-                    }
-                    else
-                    {
-                        Debug.LogError($"There is no game object named {serverName} in the scene.\n");
-                    }
-                }
+                server.TryGetComponentOrLog(out ServerActionNetwork serverNetwork);
                 return serverNetwork;
             }
+            else
+            {
+                Debug.LogError($"There is no game object named {serverName} in the scene.\n");
+                return null;
+            }
         }
 
         /// <summary>
@@ -410,7 +406,7 @@ public static ServerActionNetwork ServerNetwork
         /// <param name="recipients">List of recipients to broadcast to, will broadcast to all if this is null.</param>
         public static void BroadcastAction(String serializedAction, ulong[] recipients)
         {
-            ServerNetwork?.BroadcastActionServerRpc(serializedAction, recipients);
+            ServerNetwork.Value?.BroadcastActionServerRpc(serializedAction, recipients);
         }
 
         /// <summary>