제목 그대로 미스틱몹에서 Lib's disguises로 플레이어 스킨 적용한 몹을 소환하면 internal exception: io.netty.handler.codec.encoderexception: java.lang.classcastexception: class java.lang.byte cannot be cast to class java.util.optional (java.lang.byte and java.util.optional are in module java.base of loader 'bootstrap') 라는 메시지와 함께 튕깁니다. 아래는 오류 로그입니다. Lib's Disguises 플러그인이 문제인 거 같은데 어떻게 해결할까요? 이 플러그인을 꼭 써야하는데..버전은 10.0.36입니다.

[23:06:24 ERROR]: Packet encoding of packet ID 82 threw (skippable? false)

java.lang.ClassCastException: class java.lang.Byte cannot be cast to class java.util.Optional (java.lang.Byte and java.util.Optional are in module java.base of loader 'bootstrap')

        at net.minecraft.network.syncher.EntityDataSerializer$1.write(EntityDataSerializer.java:22) ~[?:?]

        at net.minecraft.network.syncher.SynchedEntityData$DataValue.write(SynchedEntityData.java:391) ~[?:?]

        at net.minecraft.network.protocol.game.ClientboundSetEntityDataPacket.pack(ClientboundSetEntityDataPacket.java:18) ~[?:?]

        at net.minecraft.network.protocol.game.ClientboundSetEntityDataPacket.write(ClientboundSetEntityDataPacket.java:38) ~[?:?]

        at net.minecraft.network.PacketEncoder.encode(PacketEncoder.java:41) ~[paper-1.20.1.jar:git-Paper-196]

        at net.minecraft.network.PacketEncoder.encode(PacketEncoder.java:14) ~[paper-1.20.1.jar:git-Paper-196]

        at io.netty.handler.codec.MessageToByteEncoder.write(MessageToByteEncoder.java:107) ~[netty-codec-4.1.87.Final.jar:4.1.87.Final]

        at io.netty.channel.AbstractChannelHandlerContext.invokeWrite0(AbstractChannelHandlerContext.java:881) ~[netty-transport-4.1.87.Final.jar:4.1.87.Final]

        at io.netty.channel.AbstractChannelHandlerContext.invokeWrite(AbstractChannelHandlerContext.java:863) ~[netty-transport-4.1.87.Final.jar:4.1.87.Final]

        at io.netty.channel.AbstractChannelHandlerContext.write(AbstractChannelHandlerContext.java:968) ~[netty-transport-4.1.87.Final.jar:4.1.87.Final]

        at io.netty.channel.AbstractChannelHandlerContext.write(AbstractChannelHandlerContext.java:856) ~[netty-transport-4.1.87.Final.jar:4.1.87.Final]

        at io.netty.handler.codec.MessageToByteEncoder.write(MessageToByteEncoder.java:120) ~[netty-codec-4.1.87.Final.jar:4.1.87.Final]

        at io.netty.channel.AbstractChannelHandlerContext.invokeWrite0(AbstractChannelHandlerContext.java:881) ~[netty-transport-4.1.87.Final.jar:4.1.87.Final]

        at io.netty.channel.AbstractChannelHandlerContext.invokeWrite(AbstractChannelHandlerContext.java:863) ~[netty-transport-4.1.87.Final.jar:4.1.87.Final]

        at io.netty.channel.AbstractChannelHandlerContext.write(AbstractChannelHandlerContext.java:968) ~[netty-transport-4.1.87.Final.jar:4.1.87.Final]

        at io.netty.channel.AbstractChannelHandlerContext.write(AbstractChannelHandlerContext.java:856) ~[netty-transport-4.1.87.Final.jar:4.1.87.Final]

        at io.netty.handler.codec.MessageToMessageEncoder.write(MessageToMessageEncoder.java:113) ~[netty-codec-4.1.87.Final.jar:4.1.87.Final]

        at io.netty.channel.AbstractChannelHandlerContext.invokeWrite0(AbstractChannelHandlerContext.java:881) ~[netty-transport-4.1.87.Final.jar:4.1.87.Final]

        at io.netty.channel.AbstractChannelHandlerContext.invokeWrite(AbstractChannelHandlerContext.java:863) ~[netty-transport-4.1.87.Final.jar:4.1.87.Final]

        at io.netty.channel.AbstractChannelHandlerContext.write(AbstractChannelHandlerContext.java:968) ~[netty-transport-4.1.87.Final.jar:4.1.87.Final]

        at io.netty.channel.AbstractChannelHandlerContext.write(AbstractChannelHandlerContext.java:856) ~[netty-transport-4.1.87.Final.jar:4.1.87.Final]

        at io.netty.channel.ChannelDuplexHandler.write(ChannelDuplexHandler.java:115) ~[netty-transport-4.1.87.Final.jar:4.1.87.Final]

        at io.lumine.mythic.core.volatilecode.v1_20_R1.packets.VolatileChannelHandler.write(VolatileChannelHandler.java:76) ~[MythicMobs-5.7.2.jar:?]

        at io.netty.channel.AbstractChannelHandlerContext.invokeWrite0(AbstractChannelHandlerContext.java:879) ~[netty-transport-4.1.87.Final.jar:4.1.87.Final]

        at io.netty.channel.AbstractChannelHandlerContext.invokeWrite(AbstractChannelHandlerContext.java:863) ~[netty-transport-4.1.87.Final.jar:4.1.87.Final]

        at io.netty.channel.AbstractChannelHandlerContext.write(AbstractChannelHandlerContext.java:968) ~[netty-transport-4.1.87.Final.jar:4.1.87.Final]

        at io.netty.channel.AbstractChannelHandlerContext.write(AbstractChannelHandlerContext.java:856) ~[netty-transport-4.1.87.Final.jar:4.1.87.Final]

        at io.netty.channel.DefaultChannelPipeline.write(DefaultChannelPipeline.java:1015) ~[netty-transport-4.1.87.Final.jar:4.1.87.Final]

        at io.netty.channel.AbstractChannel.write(AbstractChannel.java:301) ~[netty-transport-4.1.87.Final.jar:4.1.87.Final]

        at com.comphenix.protocol.injector.netty.channel.NettyChannelProxy.write(NettyChannelProxy.java:210) ~[ProtocolLib.jar:?]

        at com.comphenix.protocol.injector.netty.channel.NettyChannelProxy.write(NettyChannelProxy.java:199) ~[ProtocolLib.jar:?]

        at net.minecraft.network.Connection.doSendPacket(Connection.java:476) ~[?:?]

        at net.minecraft.network.Connection.lambda$sendPacket$10(Connection.java:445) ~[?:?]

        at com.comphenix.protocol.injector.netty.channel.NettyEventLoopProxy.lambda$proxyRunnable$2(NettyEventLoopProxy.java:49) ~[ProtocolLib.jar:?]

        at io.netty.util.concurrent.AbstractEventExecutor.runTask(AbstractEventExecutor.java:174) ~[netty-common-4.1.87.Final.jar:4.1.87.Final]

        at io.netty.util.concurrent.AbstractEventExecutor.safeExecute(AbstractEventExecutor.java:167) ~[netty-common-4.1.87.Final.jar:4.1.87.Final]

        at io.netty.util.concurrent.SingleThreadEventExecutor.runAllTasks(SingleThreadEventExecutor.java:470) ~[netty-common-4.1.87.Final.jar:4.1.87.Final]

        at io.netty.channel.nio.NioEventLoop.run(NioEventLoop.java:569) ~[netty-transport-4.1.87.Final.jar:4.1.87.Final]

        at io.netty.util.concurrent.SingleThreadEventExecutor$4.run(SingleThreadEventExecutor.java:997) ~[netty-common-4.1.87.Final.jar:4.1.87.Final]

        at io.netty.util.internal.ThreadExecutorMap$2.run(ThreadExecutorMap.java:74) ~[netty-common-4.1.87.Final.jar:4.1.87.Final]

        at java.lang.Thread.run(Thread.java:1447) ~[?:?]

[23:06:24 INFO]: ICEDVIP lost connection: Internal Exception: io.netty.handler.codec.EncoderException: java.lang.ClassCastException: class java.lang.Byte cannot be cast to class java.util.Optional (java.lang.Byte and java.util.Optional are in module java.base of loader 'bootstrap')