[Bug] #2538
Description
进入游戏（进门白屏），早上正常过了一会再进就白屏了，显示uid但是没有加载条
控制台：
14:58:27 INFO:RegionHandler Client xxx.xxx.xxx.xxx request: query_cur_region/os_usa
14:58:37 INFO:GameSession 客户端 /127.0.0.1:52235 已连接
java.lang.NullPointerException: Cannot invoke "emu.grasscutter.game.world.Scene.addPlayer(emu.grasscutter.game.player.Player)" because "scene" is null
at emu.grasscutter.game.world.World.addPlayer(World.java:217)
at emu.grasscutter.game.player.Player.onLogin(Player.java:1413)
at emu.grasscutter.server.packet.recv.HandlerPlayerLoginReq.handle(HandlerPlayerLoginReq.java:71)
at emu.grasscutter.server.game.GameServerPacketHandler.handle(GameServerPacketHandler.java:82)
at emu.grasscutter.server.game.GameSession.handleReceive(GameSession.java:234)
at emu.grasscutter.server.game.GameSessionManager$1.lambda$handleReceive$0(GameSessionManager.java:72)
at io.netty.util.concurrent.AbstractEventExecutor.runTask(AbstractEventExecutor.java:174)
at io.netty.channel.DefaultEventLoop.run(DefaultEventLoop.java:54)
at io.netty.util.concurrent.SingleThreadEventExecutor$4.run(SingleThreadEventExecutor.java:997)
at io.netty.util.internal.ThreadExecutorMap$2.run(ThreadExecutorMap.java:74)
at io.netty.util.concurrent.FastThreadLocalRunnable.run(FastThreadLocalRunnable.java:30)
at java.base/java.lang.Thread.run(Thread.java:842)