I tried to use it with a plug-in, but the only thing I've ever written is this mod and I'm letting you know. The plugin I've written is https://legacy.curseforge.com/minecraft/bukkit-plugins/geconomy-shops . This mod calls store residents of game character skins or players skins as commands for the economy server. However, the moment you use the command, the game crashes and the server closes. This economy mode may be a problem, but I leave a message just in case. Thank you very much for solving it though. And i use PAPAGO...sorry... Below is the error code
(1.20.1)

receiving packet 82

java.lang.ClassCastException: class java.lang.Byte cannot be cast to class java.lang.Integer (java.lang.Byte and java.lang.Integer are in module java.base of loader 'bootstrap')
at net.minecraft.network.syncher.EntityDataSerializer$1.m_6856_(EntityDataSerializer.java:30) ~[server-1.20.1-20230612.114412-srg.jar%23240!/:?]
at net.minecraft.network.syncher.SynchedEntityData$DataValue.m_252897_(SynchedEntityData.java:295) ~[server-1.20.1-20230612.114412-srg.jar%23240!/:?]
at net.minecraft.network.protocol.game.ClientboundSetEntityDataPacket.m_252763_(ClientboundSetEntityDataPacket.java:18) ~[server-1.20.1-20230612.114412-srg.jar%23240!/:?]
at net.minecraft.network.protocol.game.ClientboundSetEntityDataPacket.m_5779_(ClientboundSetEntityDataPacket.java:37) ~[server-1.20.1-20230612.114412-srg.jar%23240!/:?]
at net.minecraft.network.PacketEncoder.encode(PacketEncoder.java:45) ~[server-1.20.1-20230612.114412-srg.jar%23240!/:?]
at net.minecraft.network.PacketEncoder.encode(PacketEncoder.java:14) ~[server-1.20.1-20230612.114412-srg.jar%23240!/:?]
at io.netty.handler.codec.MessageToByteEncoder.write(MessageToByteEncoder.java:107) ~[netty-codec-4.1.82.Final.jar%23167!/:4.1.82.Final]
at io.netty.channel.AbstractChannelHandlerContext.invokeWrite0(AbstractChannelHandlerContext.java:717) ~[netty-transport-4.1.82.Final.jar%23171!/:4.1.82.Final]
at io.netty.channel.AbstractChannelHandlerContext.invokeWrite(AbstractChannelHandlerContext.java:709) ~[netty-transport-4.1.82.Final.jar%23171!/:4.1.82.Final]
at io.netty.channel.AbstractChannelHandlerContext.write(AbstractChannelHandlerContext.java:792) ~[netty-transport-4.1.82.Final.jar%23171!/:4.1.82.Final]
at io.netty.channel.AbstractChannelHandlerContext.write(AbstractChannelHandlerContext.java:702) ~[netty-transport-4.1.82.Final.jar%23171!/:4.1.82.Final]
at io.netty.handler.codec.MessageToMessageEncoder.write(MessageToMessageEncoder.java:113) ~[netty-codec-4.1.82.Final.jar%23167!/:4.1.82.Final]
at io.netty.channel.AbstractChannelHandlerContext.invokeWrite0(AbstractChannelHandlerContext.java:717) ~[netty-transport-4.1.82.Final.jar%23171!/:4.1.82.Final]
at io.netty.channel.AbstractChannelHandlerContext.invokeWrite(AbstractChannelHandlerContext.java:709) ~[netty-transport-4.1.82.Final.jar%23171!/:4.1.82.Final]
at io.netty.channel.AbstractChannelHandlerContext.write(AbstractChannelHandlerContext.java:792) ~[netty-transport-4.1.82.Final.jar%23171!/:4.1.82.Final]
at io.netty.channel.AbstractChannelHandlerContext.write(AbstractChannelHandlerContext.java:702) ~[netty-transport-4.1.82.Final.jar%23171!/:4.1.82.Final]
at io.netty.handler.codec.MessageToMessageEncoder.write(MessageToMessageEncoder.java:113) ~[netty-codec-4.1.82.Final.jar%23167!/:4.1.82.Final]
at io.netty.channel.AbstractChannelHandlerContext.invokeWrite0(AbstractChannelHandlerContext.java:717) ~[netty-transport-4.1.82.Final.jar%23171!/:4.1.82.Final]
at io.netty.channel.AbstractChannelHandlerContext.invokeWriteAndFlush(AbstractChannelHandlerContext.java:764) ~[netty-transport-4.1.82.Final.jar%23171!/:4.1.82.Final]
at io.netty.channel.AbstractChannelHandlerContext.write(AbstractChannelHandlerContext.java:790) ~[netty-transport-4.1.82.Final.jar%23171!/:4.1.82.Final]
at io.netty.channel.AbstractChannelHandlerContext.writeAndFlush(AbstractChannelHandlerContext.java:758) ~[netty-transport-4.1.82.Final.jar%23171!/:4.1.82.Final]
at io.netty.channel.AbstractChannelHandlerContext.writeAndFlush(AbstractChannelHandlerContext.java:808) ~[netty-transport-4.1.82.Final.jar%23171!/:4.1.82.Final]
at io.netty.channel.DefaultChannelPipeline.writeAndFlush(DefaultChannelPipeline.java:1025) ~[netty-transport-4.1.82.Final.jar%23171!/:4.1.82.Final]
at io.netty.channel.AbstractChannel.writeAndFlush(AbstractChannel.java:306) ~[netty-transport-4.1.82.Final.jar%23171!/:4.1.82.Final]
at net.minecraft.network.Connection.m_243087_(Connection.java:232) ~[server-1.20.1-20230612.114412-srg.jar%23240!/:?]
at net.minecraft.network.Connection.lambda$sendPacket$8(Connection.java:221) ~[server-1.20.1-20230612.114412-srg.jar%23240!/:?]
at io.netty.util.concurrent.AbstractEventExecutor.runTask(AbstractEventExecutor.java:174) [netty-common-4.1.82.Final.jar%23168!/:4.1.82.Final]
at io.netty.util.concurrent.AbstractEventExecutor.safeExecute(AbstractEventExecutor.java:167) [netty-common-4.1.82.Final.jar%23168!/:4.1.82.Final]
at io.netty.util.concurrent.SingleThreadEventExecutor.runAllTasks(SingleThreadEventExecutor.java:470) [netty-common-4.1.82.Final.jar%23168!/:4.1.82.Final]
at io.netty.channel.epoll.EpollEventLoop.run(EpollEventLoop.java:403) [netty-transport-classes-epoll-4.1.82.Final.jar%23172!/:4.1.82.Final]
at io.netty.util.concurrent.SingleThreadEventExecutor$4.run(SingleThreadEventExecutor.java:997) [netty-common-4.1.82.Final.jar%23168!/:4.1.82.Final]
at io.netty.util.internal.ThreadExecutorMap$2.run(ThreadExecutorMap.java:74) [netty-common-4.1.82.Final.jar%23168!/:4.1.82.Final]