服务端是1.8.8的。然后加了 ViaVersion-1.3.0 跨版本插件。
 本地测试是可以让1.12.2进入。
但是放到服务器上面。玩家就不能用高版本进入了。。
一进就刷报错。
| [02:20:38] [Server thread/WARN]: [ProtocolLib] Error filtering reports: java.lang.IllegalArgumentException: Cannot find report name for Unable to send packet %s to %s [02:20:38] [Server thread/WARN]: [ProtocolLib] [ProtocolLibrary] Unable to send packet net.minecraft.server.v1_8_R3.PacketPlayOutMapChunk@286ec528 to tarnm5
 java.lang.NullPointerException: nmsPlayer cannot be null!
 at com.google.common.base.Preconditions.checkNotNull(Preconditions.java:229) ~[PaperSpigot-1.8.8-R0.1-SNAPSHOT-latest.jar:git-PaperSpigot-f6fba00-9935adc]
 at com.comphenix.protocol.utility.MinecraftFields.getPlayerConnection(MinecraftFields.java:55) ~[%5B前置插件1.8%5DProtocolLib3.6.5%20for%201.8.jar:3.6.5-b222]
 at com.comphenix.protocol.utility.MinecraftFields.getPlayerConnection(MinecraftFields.java:50) ~[%5B前置插件1.8%5DProtocolLib3.6.5%20for%201.8.jar:3.6.5-b222]
 at com.comphenix.protocol.compat.netty.independent.NettyChannelInjector.getPlayerConnection(NettyChannelInjector.java:724) ~[%5B前置插件1.8%5DProtocolLib3.6.5%20for%201.8.jar:3.6.5-b222]
 at com.comphenix.protocol.compat.netty.independent.NettyChannelInjector.invokeSendPacket(NettyChannelInjector.java:676) [%5B前置插件1.8%5DProtocolLib3.6.5%20for%201.8.jar:3.6.5-b222]
 at com.comphenix.protocol.compat.netty.independent.NettyChannelInjector.access$600(NettyChannelInjector.java:82) [%5B前置插件1.8%5DProtocolLib3.6.5%20for%201.8.jar:3.6.5-b222]
 at com.comphenix.protocol.compat.netty.independent.NettyChannelInjector$6.run(NettyChannelInjector.java:519) [%5B前置插件1.8%5DProtocolLib3.6.5%20for%201.8.jar:3.6.5-b222]
 at org.bukkit.craftbukkit.v1_8_R3.scheduler.CraftTask.run(CraftTask.java:71) [PaperSpigot-1.8.8-R0.1-SNAPSHOT-latest.jar:git-PaperSpigot-f6fba00-9935adc]
 at org.bukkit.craftbukkit.v1_8_R3.scheduler.CraftScheduler.mainThreadHeartbeat(CraftScheduler.java:350) [PaperSpigot-1.8.8-R0.1-SNAPSHOT-latest.jar:git-PaperSpigot-f6fba00-9935adc]
 at net.minecraft.server.v1_8_R3.MinecraftServer.B(MinecraftServer.java:779) [PaperSpigot-1.8.8-R0.1-SNAPSHOT-latest.jar:git-PaperSpigot-f6fba00-9935adc]
 at net.minecraft.server.v1_8_R3.DedicatedServer.B(DedicatedServer.java:378) [PaperSpigot-1.8.8-R0.1-SNAPSHOT-latest.jar:git-PaperSpigot-f6fba00-9935adc]
 at net.minecraft.server.v1_8_R3.MinecraftServer.A(MinecraftServer.java:710) [PaperSpigot-1.8.8-R0.1-SNAPSHOT-latest.jar:git-PaperSpigot-f6fba00-9935adc]
 at net.minecraft.server.v1_8_R3.MinecraftServer.run(MinecraftServer.java:613) [PaperSpigot-1.8.8-R0.1-SNAPSHOT-latest.jar:git-PaperSpigot-f6fba00-9935adc]
 at java.lang.Thread.run(Unknown Source) [?:1.8.0_161]
 [02:20:38] [Server thread/WARN]: [ProtocolLib] Error filtering reports: java.lang.IllegalArgumentException: Cannot find report name for Unable to send packet %s to %s
 [02:20:38] [Server thread/WARN]: [ProtocolLib] [ProtocolLibrary] Unable to send packet net.minecraft.server.v1_8_R3.PacketPlayOutMapChunk@3ede1b9c to tarnm5
 java.lang.NullPointerException: nmsPlayer cannot be null!
 at com.google.common.base.Preconditions.checkNotNull(Preconditions.java:229) ~[PaperSpigot-1.8.8-R0.1-SNAPSHOT-latest.jar:git-PaperSpigot-f6fba00-9935adc]
 at com.comphenix.protocol.utility.MinecraftFields.getPlayerConnection(MinecraftFields.java:55) ~[%5B前置插件1.8%5DProtocolLib3.6.5%20for%201.8.jar:3.6.5-b222]
 at com.comphenix.protocol.utility.MinecraftFields.getPlayerConnection(MinecraftFields.java:50) ~[%5B前置插件1.8%5DProtocolLib3.6.5%20for%201.8.jar:3.6.5-b222]
 at com.comphenix.protocol.compat.netty.independent.NettyChannelInjector.getPlayerConnection(NettyChannelInjector.java:724) ~[%5B前置插件1.8%5DProtocolLib3.6.5%20for%201.8.jar:3.6.5-b222]
 at com.comphenix.protocol.compat.netty.independent.NettyChannelInjector.invokeSendPacket(NettyChannelInjector.java:676) [%5B前置插件1.8%5DProtocolLib3.6.5%20for%201.8.jar:3.6.5-b222]
 at com.comphenix.protocol.compat.netty.independent.NettyChannelInjector.access$600(NettyChannelInjector.java:82) [%5B前置插件1.8%5DProtocolLib3.6.5%20for%201.8.jar:3.6.5-b222]
 at com.comphenix.protocol.compat.netty.independent.NettyChannelInjector$6.run(NettyChannelInjector.java:519) [%5B前置插件1.8%5DProtocolLib3.6.5%20for%201.8.jar:3.6.5-b222]
 at org.bukkit.craftbukkit.v1_8_R3.scheduler.CraftTask.run(CraftTask.java:71) [PaperSpigot-1.8.8-R0.1-SNAPSHOT-latest.jar:git-PaperSpigot-f6fba00-9935adc]
 at org.bukkit.craftbukkit.v1_8_R3.scheduler.CraftScheduler.mainThreadHeartbeat(CraftScheduler.java:350) [PaperSpigot-1.8.8-R0.1-SNAPSHOT-latest.jar:git-PaperSpigot-f6fba00-9935adc]
 at net.minecraft.server.v1_8_R3.MinecraftServer.B(MinecraftServer.java:779) [PaperSpigot-1.8.8-R0.1-SNAPSHOT-latest.jar:git-PaperSpigot-f6fba00-9935adc]
 at net.minecraft.server.v1_8_R3.DedicatedServer.B(DedicatedServer.java:378) [PaperSpigot-1.8.8-R0.1-SNAPSHOT-latest.jar:git-PaperSpigot-f6fba00-9935adc]
 at net.minecraft.server.v1_8_R3.MinecraftServer.A(MinecraftServer.java:710) [PaperSpigot-1.8.8-R0.1-SNAPSHOT-latest.jar:git-PaperSpigot-f6fba00-9935adc]
 at net.minecraft.server.v1_8_R3.MinecraftServer.run(MinecraftServer.java:613) [PaperSpigot-1.8.8-R0.1-SNAPSHOT-latest.jar:git-PaperSpigot-f6fba00-9935adc]
 at java.lang.Thread.run(Unknown Source) [?:1.8.0_161]
 | 
 
 
这种怎么解决?
玩家进入是提示,您已在游戏当中.