Error "Unhandled exception number 32 occurred in onPacketSending(PacketEvent) for LockettePro"

[ilgrandeanonimo]

Is a plugin or a config/server problem? If config/server how to fix?

[23:58:54 ERROR]: [LockettePro] Unhandled exception number 32 occurred in onPacketSending(PacketEvent) for LockettePro
com.comphenix.protocol.reflect.FieldAccessException: Field index 0 is out of bounds for length 0
        at com.comphenix.protocol.reflect.FieldAccessException.fromFormat(FieldAccessException.java:49) ~[ProtocolLib.jar:?]
        at com.comphenix.protocol.reflect.StructureModifier.read(StructureModifier.java:245) ~[ProtocolLib.jar:?]
        at me.crafter.mc.lockettepro.DependencyProtocolLib$1.onPacketSending(DependencyProtocolLib.java:42) ~[LockettePro-2.11.1.jar:?]
        at com.comphenix.protocol.injector.SortedPacketListenerList.invokeSendingListener(SortedPacketListenerList.java:219) ~[ProtocolLib.jar:?]
        at com.comphenix.protocol.injector.SortedPacketListenerList.invokeUnpackedPacketSending(SortedPacketListenerList.java:204) ~[ProtocolLib.jar:?]
        at com.comphenix.protocol.injector.SortedPacketListenerList.invokePacketSending(SortedPacketListenerList.java:149) ~[ProtocolLib.jar:?]
        at com.comphenix.protocol.injector.SortedPacketListenerList.invokePacketSending(SortedPacketListenerList.java:139) ~[ProtocolLib.jar:?]
        at com.comphenix.protocol.injector.PacketFilterManager.postPacketToListeners(PacketFilterManager.java:553) ~[ProtocolLib.jar:?]
        at com.comphenix.protocol.injector.PacketFilterManager.invokePacketSending(PacketFilterManager.java:526) ~[ProtocolLib.jar:?]
        at com.comphenix.protocol.injector.netty.manager.NetworkManagerInjector.onPacketSending(NetworkManagerInjector.java:100) ~[ProtocolLib.jar:?]
        at com.comphenix.protocol.injector.netty.channel.NettyChannelInjector.processOutbound(NettyChannelInjector.java:565) ~[ProtocolLib.jar:?]
        at com.comphenix.protocol.injector.netty.channel.NettyChannelInjector$2.doProxyRunnable(NettyChannelInjector.java:468) ~[ProtocolLib.jar:?]
        at com.comphenix.protocol.injector.netty.channel.NettyEventLoopProxy.proxyRunnable(NettyEventLoopProxy.java:43) ~[ProtocolLib.jar:?]
        at com.comphenix.protocol.injector.netty.channel.NettyEventLoopProxy.execute(NettyEventLoopProxy.java:252) ~[ProtocolLib.jar:?]
        at net.minecraft.network.Connection.sendPacket(Connection.java:449) ~[?:?]
        at net.minecraft.network.Connection.send(Connection.java:392) ~[?:?]
        at net.minecraft.server.network.ServerGamePacketListenerImpl.send(ServerGamePacketListenerImpl.java:2217) ~[?:?]
        at net.minecraft.server.network.ServerGamePacketListenerImpl.send(ServerGamePacketListenerImpl.java:2203) ~[?:?]
        at net.minecraft.server.level.ChunkHolder.lambda$broadcast$1(ChunkHolder.java:402) ~[?:?]
        at java.util.ArrayList.forEach(ArrayList.java:1511) ~[?:?]
        at net.minecraft.server.level.ChunkHolder.broadcast(ChunkHolder.java:401) ~[?:?]
        at net.minecraft.server.level.ChunkHolder.broadcastBlockEntity(ChunkHolder.java:375) ~[?:?]
        at net.minecraft.server.level.ChunkHolder.broadcastBlockEntityIfNeeded(ChunkHolder.java:363) ~[?:?]
        at net.minecraft.server.level.ChunkHolder.broadcastChanges(ChunkHolder.java:339) ~[?:?]
        at net.minecraft.server.level.ServerChunkCache.tickChunks(ServerChunkCache.java:659) ~[?:?]
        at net.minecraft.server.level.ServerChunkCache.tick(ServerChunkCache.java:499) ~[?:?]
        at net.minecraft.server.level.ServerLevel.tick(ServerLevel.java:827) ~[?:?]
        at net.minecraft.server.MinecraftServer.tickChildren(MinecraftServer.java:1556) ~[paper-1.20.1.jar:git-Paper-169]
        at net.minecraft.server.dedicated.DedicatedServer.tickChildren(DedicatedServer.java:446) ~[paper-1.20.1.jar:git-Paper-169]
        at net.minecraft.server.MinecraftServer.tickServer(MinecraftServer.java:1393) ~[paper-1.20.1.jar:git-Paper-169]
        at net.minecraft.server.MinecraftServer.runServer(MinecraftServer.java:1170) ~[paper-1.20.1.jar:git-Paper-169]
        at net.minecraft.server.MinecraftServer.lambda$spin$0(MinecraftServer.java:317) ~[paper-1.20.1.jar:git-Paper-169]
        at java.lang.Thread.run(Thread.java:833) ~[?:?]