Some fixes

src/Game.cpp

@@ -564,6 +564,10 @@ namespace FRG
 			if (!endpoint.parse(kMultiplayerServerUrl)) {
 				logger() << "[network] Invalid multiplayer server URL: "
 					<< kMultiplayerServerUrl << std::endl;
+				remoteCampaignActive = false;
+				gameServer.use(internalGameServer);
+				gameServerHost.use(localGameServerHost);
+				return;
 			}
 			websocketGameClient = std::make_unique<WebsocketGameClient>(endpoint);
 			remoteGameServerHost =