一生成怪物后台出现
[LumineUtils] (io.lumine.utils.) is bound to plugin MythicMobs - io.lumine.xikage.mythicmobs.MythicMobs
[12:59:33 WARN]: java.lang.NoSuchMethodException: java.util.Collections$SingletonList.<init>()
[12:59:33 WARN]:        at java.lang.Class.getConstructor0(Unknown Source)
[12:59:33 WARN]:        at java.lang.Class.getConstructor(Unknown Source)
[12:59:33 WARN]:        at com.comphenix.protocol.wrappers.BukkitConverters.getGenericList(BukkitConverters.java:277)
[12:59:33 WARN]:        at com.comphenix.protocol.wrappers.BukkitConverters.access$100(BukkitConverters.java:88)
[12:59:33 WARN]:        at com.comphenix.protocol.wrappers.BukkitConverters$3.getGeneric(BukkitConverters.java:367)
[12:59:33 WARN]:        at com.comphenix.protocol.wrappers.BukkitConverters$3.getGeneric(BukkitConverters.java:359)
[12:59:33 WARN]:        at com.comphenix.protocol.wrappers.Converters$1.getGeneric(Converters.java:48)
[12:59:33 WARN]:        at com.comphenix.protocol.reflect.StructureModifier.writeInternal(StructureModifier.java:372)
[12:59:33 WARN]:        at com.comphenix.protocol.reflect.StructureModifier.write(StructureModifier.java:345)
[12:59:33 WARN]:        at me.libraryaddict.disguise.utilities.DisguiseUtilities.getTabPacket(DisguiseUtilities.java:2759)
[12:59:33 WARN]:        at me.libraryaddict.disguise.utilities.listeners.PlayerSkinHandler.doPacketRemoval(PlayerSkinHandler.java:371)
[12:59:33 WARN]:        at me.libraryaddict.disguise.utilities.listeners.PlayerSkinHandler.lambda$tryProcess$12(PlayerSkinHandler.java:398)
[12:59:33 WARN]:        at java.util.ArrayList.forEach(Unknown Source)
[12:59:33 WARN]:        at me.libraryaddict.disguise.utilities.listeners.PlayerSkinHandler.tryProcess(PlayerSkinHandler.java:398)
[12:59:33 WARN]:        at me.libraryaddict.disguise.utilities.listeners.PlayerSkinHandler.onMove(PlayerSkinHandler.java:409)
[12:59:33 WARN]:        at com.destroystokyo.paper.event.executor.asm.generated.GeneratedEventExecutor70.execute(Unknown Source)
[12:59:33 WARN]:        at org.bukkit.plugin.EventExecutor$2.execute(EventExecutor.java:70)
[12:59:33 WARN]:        at co.aikar.timings.TimedEventExecutor.execute(TimedEventExecutor.java:78)
[12:59:33 WARN]:        at org.bukkit.plugin.RegisteredListener.callEvent(RegisteredListener.java:62)
[12:59:33 WARN]:        at org.bukkit.plugin.SimplePluginManager.callEvent(SimplePluginManager.java:513)
[12:59:33 WARN]:        at net.minecraft.server.v1_12_R1.PlayerConnection.a(PlayerConnection.java:698)
[12:59:33 WARN]:        at net.minecraft.server.v1_12_R1.PacketPlayInFlying.a(SourceFile:126)
[12:59:33 WARN]:        at net.minecraft.server.v1_12_R1.PacketPlayInFlying$PacketPlayInPosition.a(SourceFile:57)
[12:59:33 WARN]:        at net.minecraft.server.v1_12_R1.PlayerConnectionUtils.lambda$ensureMainThread$0(PlayerConnectionUtils.java:14)
[12:59:33 WARN]:        at java.util.concurrent.Executors$RunnableAdapter.call(Unknown Source)
[12:59:33 WARN]:        at java.util.concurrent.FutureTask.run(Unknown Source)
[12:59:33 WARN]:        at net.minecraft.server.v1_12_R1.SystemUtils.a(SourceFile:46)
[12:59:33 WARN]:        at net.minecraft.server.v1_12_R1.MinecraftServer.D(MinecraftServer.java:850)
[12:59:33 WARN]:        at net.minecraft.server.v1_12_R1.DedicatedServer.D(DedicatedServer.java:423)
[12:59:33 WARN]:        at net.minecraft.server.v1_12_R1.MinecraftServer.C(MinecraftServer.java:774)
[12:59:33 WARN]:        at net.minecraft.server.v1_12_R1.MinecraftServer.run(MinecraftServer.java:666)
[12:59:33 WARN]:        at java.lang.Thread.run(Unknown Source)

这个是什么意思啊？会有影响吗

你用的MM什么版本

版本是4.4.0

伪装插件用的LibsDisguises-10.0.31-Free

4.4是否有点..太低了。有些方法不支持。1.12最高能用4.12，推荐是用4.11，当然你要更新原来的配置估计就报废了。