玩家掉线，后台报错，内容如下，时间由下往上
19.10 14:47:26 [Server] 信息 /111.74.65.173:3434 lost connection
19.10 14:47:26 [Server] 信息 Disconnecting /111.74.65.173:3434: Protocol error
19.10 14:47:18 [Multicraft] Skipped 16 lines due to rate limit (30/s)
19.10 14:47:18 [Server] 警告 Tiles Last Tick: 0
19.10 14:47:18 [Server] 警告 Entities Last Tick: 0
19.10 14:47:18 [Server] 警告 Loaded Chunks: 0 Active Chunks: 0 Entities: 0 Tile Entities: 0
19.10 14:47:18 [Server] 警告 Dimension:-19
19.10 14:47:18 [Server] 警告 Tiles Last Tick: 0
19.10 14:47:18 [Server] 警告 Entities Last Tick: 0
19.10 14:47:18 [Server] 警告 Loaded Chunks: 0 Active Chunks: 0 Entities: 0 Tile Entities: 0
19.10 14:47:18 [Server] 警告 Dimension:7
19.10 14:47:18 [Server] 警告 Tiles Last Tick: 0
19.10 14:47:18 [Server] 警告 Entities Last Tick: 74
19.10 14:47:18 [Server] 警告 Loaded Chunks: 2838 Active Chunks: 72 Entities: 266 Tile Entities: 2809
19.10 14:47:18 [Server] 警告 Dimension:0
19.10 14:47:18 [Server] 警告 [TPS]: 20.0 Server Tick #4518
19.10 14:47:18 [Server] 警告 Last Tick: 1413701212808 Current Time: 1413701238089 Warning: 20000 Timeout: 60000
19.10 14:47:18 [Server] 警告 The server is going slow. Last server tick was 25281ms ago
19.10 14:47:18 [Server] INFO               
19.10 14:47:02 [Server] 信息 Nest (type 0) Generated @{-487,63,465}
19.10 14:47:02 [Server] 信息 Nest (type 0) Generated @{-487,63,465}
19.10 14:47:02 [Server] 信息 Adding NestData "nest0"

是什么问题呢？

把服务端错误报告贴出来