刚才打开游戏，提示定期维护，需要几个小时，这是为什么？是不是维护完了然后更新？求有经验的朋友们解答一下

We are investigating server issues in Europe.
At first glance, there appear to be fairly widespread internet issues across Europe that are affecting a number of games and sites, including ours.
For the moment, we will be running all matches using North American servers until the European internet stabilizes. We will also be shutting down the Ranked/League Queues.
Will update soon with more.