Mod Version
2.6.3+1.21.1

Describe the bug
Whenever I try to use this mod to search for a polymer item it will kick my client (I also have this mod on the client side) with an error for a custom item.

Expected behavior
To show the item's location and not kick me.

To Reproduce
search for any polymer item with polymer and the mod of your choice on the server.

Log File (Recommended)
[Netty Client IO #12/ERROR]: An exception occurred while handling a packet io.netty.handler.codec.DecoderException: Failed to decode packet 'clientbound/minecraft:custom_payload' at knot//MC/net.minecraft.network.handler.PacketCodecDispatcher.decode(PacketCodecDispatcher.java:38) ~[client-intermediary.jar:?] at knot//MC/net.minecraft.network.handler.PacketCodecDispatcher.decode(PacketCodecDispatcher.java:14) ~[client-intermediary.jar:?] at knot//MC/net.minecraft.network.handler.DecoderHandler.decode(DecoderHandler.java:31) ~[client-intermediary.jar:?] at knot/io.netty.handler.codec.ByteToMessageDecoder.decodeRemovalReentryProtection(ByteToMessageDecoder.java:529) ~[netty-codec-4.1.97.Final.jar:?] at knot/io.netty.handler.codec.ByteToMessageDecoder.callDecode(ByteToMessageDecoder.java:468) ~[netty-codec-4.1.97.Final.jar:?] at knot/io.netty.handler.codec.ByteToMessageDecoder.channelRead(ByteToMessageDecoder.java:290) ~[netty-codec-4.1.97.Final.jar:?] at knot/io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:444) ~[netty-transport-4.1.97.Final.jar:?] at knot/io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:420) ~[netty-transport-4.1.97.Final.jar:?] at knot/io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:412) ~[netty-transport-4.1.97.Final.jar:?] at knot/io.netty.channel.ChannelInboundHandlerAdapter.channelRead(ChannelInboundHandlerAdapter.java:93) ~[netty-transport-4.1.97.Final.jar:?] at knot/com.replaymod.recording.packet.PacketListener.channelRead(PacketListener.java:356) ~[replaymod-1.21-2.6.19.jar:?] at knot/io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:444) ~[netty-transport-4.1.97.Final.jar:?] at knot/io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:420) ~[netty-transport-4.1.97.Final.jar:?] at knot/io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:412) ~[netty-transport-4.1.97.Final.jar:?] at knot/io.netty.handler.flow.FlowControlHandler.dequeue(FlowControlHandler.java:202) ~[netty-handler-4.1.97.Final.jar:?] at knot/io.netty.handler.flow.FlowControlHandler.channelRead(FlowControlHandler.java:164) ~[netty-handler-4.1.97.Final.jar:?] at knot/io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:442) ~[netty-transport-4.1.97.Final.jar:?] at knot/io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:420) ~[netty-transport-4.1.97.Final.jar:?] at knot/io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:412) ~[netty-transport-4.1.97.Final.jar:?] at knot/io.netty.handler.codec.ByteToMessageDecoder.fireChannelRead(ByteToMessageDecoder.java:346) ~[netty-codec-4.1.97.Final.jar:?] at knot/io.netty.handler.codec.ByteToMessageDecoder.channelRead(ByteToMessageDecoder.java:318) ~[netty-codec-4.1.97.Final.jar:?] at knot/io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:444) ~[netty-transport-4.1.97.Final.jar:?] at knot/io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:420) ~[netty-transport-4.1.97.Final.jar:?] at knot/io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:412) ~[netty-transport-4.1.97.Final.jar:?] at knot/io.netty.handler.codec.ByteToMessageDecoder.fireChannelRead(ByteToMessageDecoder.java:346) ~[netty-codec-4.1.97.Final.jar:?] at knot/io.netty.handler.codec.ByteToMessageDecoder.channelRead(ByteToMessageDecoder.java:318) ~[netty-codec-4.1.97.Final.jar:?] at knot/io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:444) ~[netty-transport-4.1.97.Final.jar:?] at knot/io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:420) ~[netty-transport-4.1.97.Final.jar:?] at knot/io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:412) ~[netty-transport-4.1.97.Final.jar:?] at knot/io.netty.handler.codec.MessageToMessageDecoder.channelRead(MessageToMessageDecoder.java:103) ~[netty-codec-4.1.97.Final.jar:?] at knot/io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:444) ~[netty-transport-4.1.97.Final.jar:?] at knot/io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:420) ~[netty-transport-4.1.97.Final.jar:?] at knot/io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:412) ~[netty-transport-4.1.97.Final.jar:?] at knot/io.netty.handler.timeout.IdleStateHandler.channelRead(IdleStateHandler.java:286) ~[netty-handler-4.1.97.Final.jar:?] at knot/io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:442) ~[netty-transport-4.1.97.Final.jar:?] at knot/io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:420) ~[netty-transport-4.1.97.Final.jar:?] at knot/io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:412) ~[netty-transport-4.1.97.Final.jar:?] at knot/io.netty.channel.DefaultChannelPipeline$HeadContext.channelRead(DefaultChannelPipeline.java:1410) ~[netty-transport-4.1.97.Final.jar:?] at knot/io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:440) ~[netty-transport-4.1.97.Final.jar:?] at knot/io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:420) ~[netty-transport-4.1.97.Final.jar:?] at knot/io.netty.channel.DefaultChannelPipeline.fireChannelRead(DefaultChannelPipeline.java:919) ~[netty-transport-4.1.97.Final.jar:?] at knot/io.netty.channel.nio.AbstractNioByteChannel$NioByteUnsafe.read(AbstractNioByteChannel.java:166) ~[netty-transport-4.1.97.Final.jar:?] at knot/io.netty.channel.nio.NioEventLoop.processSelectedKey(NioEventLoop.java:788) ~[netty-transport-4.1.97.Final.jar:?] at knot/io.netty.channel.nio.NioEventLoop.processSelectedKeysOptimized(NioEventLoop.java:724) ~[netty-transport-4.1.97.Final.jar:?] at knot/io.netty.channel.nio.NioEventLoop.processSelectedKeys(NioEventLoop.java:650) ~[netty-transport-4.1.97.Final.jar:?] at knot/io.netty.channel.nio.NioEventLoop.run(NioEventLoop.java:562) ~[netty-transport-4.1.97.Final.jar:?] at knot/io.netty.util.concurrent.SingleThreadEventExecutor$4.run(SingleThreadEventExecutor.java:997) ~[netty-common-4.1.97.Final.jar:?] at knot/io.netty.util.internal.ThreadExecutorMap$2.run(ThreadExecutorMap.java:74) ~[netty-common-4.1.97.Final.jar:?] at java.base/java.lang.Thread.run(Thread.java:1583) [?:?] Caused by: io.netty.handler.codec.DecoderException: Failed to decode: Unknown registry key in ResourceKey[minecraft:root / minecraft:item]: moretools:iron_hammer [{item:"moretools:iron_hammer",type:"whereisit:item"}] at knot//MC/net.minecraft.network.codec.PacketCodecs$6.method_56900(PacketCodecs.java:273) ~[client-intermediary.jar:?] at knot/com.mojang.serialization.DataResult$Error.md1132c6$owo$lambda$addStackTraceToException$0$0(DataResult.java:565) ~[datafixerupper-8.0.16.jar:?] at knot/com.mojang.serialization.DataResult$Error.getOrThrow(DataResult.java:287) ~[datafixerupper-8.0.16.jar:?] at knot//MC/net.minecraft.network.codec.PacketCodecs$6.decode(PacketCodecs.java:273) ~[client-intermediary.jar:?] at knot//MC/net.minecraft.network.codec.PacketCodecs$6.decode(PacketCodecs.java:268) ~[client-intermediary.jar:?] at knot//MC/net.minecraft.network.codec.PacketCodec$13.decode(PacketCodec.java:173) ~[client-intermediary.jar:?] at knot//MC/net.minecraft.network.packet.CustomPayload$1.decode(CustomPayload.java:63) ~[client-intermediary.jar:?] at knot//MC/net.minecraft.network.packet.CustomPayload$1.decode(CustomPayload.java:39) ~[client-intermediary.jar:?] at knot//MC/net.minecraft.network.codec.PacketCodec$8.decode(PacketCodec.java:76) ~[client-intermediary.jar:?] at knot//MC/net.minecraft.network.codec.PacketCodec$9.decode(PacketCodec.java:91) ~[client-intermediary.jar:?] at knot//MC/net.minecraft.network.codec.PacketCodec$9.decode(PacketCodec.java:87) ~[client-intermediary.jar:?] at knot//MC/net.minecraft.network.handler.PacketCodecDispatcher.decode(PacketCodecDispatcher.java:36) ~[client-intermediary.jar:?] ... 48 more [14:35:53] [Netty Client IO #12/ERROR]: Network Exception Caught io.netty.handler.codec.DecoderException: Failed to decode packet 'clientbound/minecraft:custom_payload' at knot//MC/net.minecraft.network.handler.PacketCodecDispatcher.decode(PacketCodecDispatcher.java:38) ~[client-intermediary.jar:?] at knot//MC/net.minecraft.network.handler.PacketCodecDispatcher.decode(PacketCodecDispatcher.java:14) ~[client-intermediary.jar:?] at knot//MC/net.minecraft.network.handler.DecoderHandler.decode(DecoderHandler.java:31) ~[client-intermediary.jar:?] at knot/io.netty.handler.codec.ByteToMessageDecoder.decodeRemovalReentryProtection(ByteToMessageDecoder.java:529) ~[netty-codec-4.1.97.Final.jar:?] at knot/io.netty.handler.codec.ByteToMessageDecoder.callDecode(ByteToMessageDecoder.java:468) ~[netty-codec-4.1.97.Final.jar:?] at knot/io.netty.handler.codec.ByteToMessageDecoder.channelRead(ByteToMessageDecoder.java:290) ~[netty-codec-4.1.97.Final.jar:?] at knot/io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:444) ~[netty-transport-4.1.97.Final.jar:?] at knot/io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:420) ~[netty-transport-4.1.97.Final.jar:?] at knot/io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:412) ~[netty-transport-4.1.97.Final.jar:?] at knot/io.netty.channel.ChannelInboundHandlerAdapter.channelRead(ChannelInboundHandlerAdapter.java:93) ~[netty-transport-4.1.97.Final.jar:?] at knot/com.replaymod.recording.packet.PacketListener.channelRead(PacketListener.java:356) ~[replaymod-1.21-2.6.19.jar:?] at knot/io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:444) ~[netty-transport-4.1.97.Final.jar:?] at knot/io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:420) ~[netty-transport-4.1.97.Final.jar:?] at knot/io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:412) ~[netty-transport-4.1.97.Final.jar:?] at knot/io.netty.handler.flow.FlowControlHandler.dequeue(FlowControlHandler.java:202) ~[netty-handler-4.1.97.Final.jar:?] at knot/io.netty.handler.flow.FlowControlHandler.channelRead(FlowControlHandler.java:164) ~[netty-handler-4.1.97.Final.jar:?] at knot/io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:442) ~[netty-transport-4.1.97.Final.jar:?] at knot/io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:420) ~[netty-transport-4.1.97.Final.jar:?] at knot/io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:412) ~[netty-transport-4.1.97.Final.jar:?] at knot/io.netty.handler.codec.ByteToMessageDecoder.fireChannelRead(ByteToMessageDecoder.java:346) ~[netty-codec-4.1.97.Final.jar:?] at knot/io.netty.handler.codec.ByteToMessageDecoder.channelRead(ByteToMessageDecoder.java:318) ~[netty-codec-4.1.97.Final.jar:?] at knot/io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:444) ~[netty-transport-4.1.97.Final.jar:?] at knot/io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:420) ~[netty-transport-4.1.97.Final.jar:?] at knot/io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:412) ~[netty-transport-4.1.97.Final.jar:?] at knot/io.netty.handler.codec.ByteToMessageDecoder.fireChannelRead(ByteToMessageDecoder.java:346) ~[netty-codec-4.1.97.Final.jar:?] at knot/io.netty.handler.codec.ByteToMessageDecoder.channelRead(ByteToMessageDecoder.java:318) ~[netty-codec-4.1.97.Final.jar:?] at knot/io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:444) ~[netty-transport-4.1.97.Final.jar:?] at knot/io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:420) ~[netty-transport-4.1.97.Final.jar:?] at knot/io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:412) ~[netty-transport-4.1.97.Final.jar:?] at knot/io.netty.handler.codec.MessageToMessageDecoder.channelRead(MessageToMessageDecoder.java:103) ~[netty-codec-4.1.97.Final.jar:?] at knot/io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:444) ~[netty-transport-4.1.97.Final.jar:?] at knot/io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:420) ~[netty-transport-4.1.97.Final.jar:?] at knot/io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:412) ~[netty-transport-4.1.97.Final.jar:?] at knot/io.netty.handler.timeout.IdleStateHandler.channelRead(IdleStateHandler.java:286) ~[netty-handler-4.1.97.Final.jar:?] at knot/io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:442) ~[netty-transport-4.1.97.Final.jar:?] at knot/io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:420) ~[netty-transport-4.1.97.Final.jar:?] at knot/io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:412) ~[netty-transport-4.1.97.Final.jar:?] at knot/io.netty.channel.DefaultChannelPipeline$HeadContext.channelRead(DefaultChannelPipeline.java:1410) ~[netty-transport-4.1.97.Final.jar:?] at knot/io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:440) ~[netty-transport-4.1.97.Final.jar:?] at knot/io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:420) ~[netty-transport-4.1.97.Final.jar:?] at knot/io.netty.channel.DefaultChannelPipeline.fireChannelRead(DefaultChannelPipeline.java:919) ~[netty-transport-4.1.97.Final.jar:?] at knot/io.netty.channel.nio.AbstractNioByteChannel$NioByteUnsafe.read(AbstractNioByteChannel.java:166) ~[netty-transport-4.1.97.Final.jar:?] at knot/io.netty.channel.nio.NioEventLoop.processSelectedKey(NioEventLoop.java:788) ~[netty-transport-4.1.97.Final.jar:?] at knot/io.netty.channel.nio.NioEventLoop.processSelectedKeysOptimized(NioEventLoop.java:724) ~[netty-transport-4.1.97.Final.jar:?] at knot/io.netty.channel.nio.NioEventLoop.processSelectedKeys(NioEventLoop.java:650) ~[netty-transport-4.1.97.Final.jar:?] at knot/io.netty.channel.nio.NioEventLoop.run(NioEventLoop.java:562) ~[netty-transport-4.1.97.Final.jar:?] at knot/io.netty.util.concurrent.SingleThreadEventExecutor$4.run(SingleThreadEventExecutor.java:997) ~[netty-common-4.1.97.Final.jar:?] at knot/io.netty.util.internal.ThreadExecutorMap$2.run(ThreadExecutorMap.java:74) ~[netty-common-4.1.97.Final.jar:?] at java.base/java.lang.Thread.run(Thread.java:1583) [?:?] Caused by: io.netty.handler.codec.DecoderException: Failed to decode: Unknown registry key in ResourceKey[minecraft:root / minecraft:item]: moretools:iron_hammer [{item:"moretools:iron_hammer",type:"whereisit:item"}] at knot//MC/net.minecraft.network.codec.PacketCodecs$6.method_56900(PacketCodecs.java:273) ~[client-intermediary.jar:?] at knot/com.mojang.serialization.DataResult$Error.md1132c6$owo$lambda$addStackTraceToException$0$0(DataResult.java:565) ~[datafixerupper-8.0.16.jar:?] at knot/com.mojang.serialization.DataResult$Error.getOrThrow(DataResult.java:287) ~[datafixerupper-8.0.16.jar:?] at knot//MC/net.minecraft.network.codec.PacketCodecs$6.decode(PacketCodecs.java:273) ~[client-intermediary.jar:?] at knot//MC/net.minecraft.network.codec.PacketCodecs$6.decode(PacketCodecs.java:268) ~[client-intermediary.jar:?] at knot//MC/net.minecraft.network.codec.PacketCodec$13.decode(PacketCodec.java:173) ~[client-intermediary.jar:?] at knot//MC/net.minecraft.network.packet.CustomPayload$1.decode(CustomPayload.java:63) ~[client-intermediary.jar:?] at knot//MC/net.minecraft.network.packet.CustomPayload$1.decode(CustomPayload.java:39) ~[client-intermediary.jar:?] at knot//MC/net.minecraft.network.codec.PacketCodec$8.decode(PacketCodec.java:76) ~[client-intermediary.jar:?] at knot//MC/net.minecraft.network.codec.PacketCodec$9.decode(PacketCodec.java:91) ~[client-intermediary.jar:?] at knot//MC/net.minecraft.network.codec.PacketCodec$9.decode(PacketCodec.java:87) ~[client-intermediary.jar:?] at knot//MC/net.minecraft.network.handler.PacketCodecDispatcher.decode(PacketCodecDispatcher.java:36) ~[client-intermediary.jar:?] ... 48 more [14:35:53] [Netty Client IO #12/ERROR]: Negative index in crash report handler (49/53) [14:35:53] [Netty Client IO #12/ERROR]: An exception occurred while handling a packet io.netty.channel.StacklessClosedChannelException: null at io.netty.channel.AbstractChannel$AbstractUnsafe.write(Object, ChannelPromise)(Unknown Source) ~[netty-transport-4.1.97.Final.jar:?] [14:35:54] [Render thread/INFO]: [voicechat] Clearing audio channels [14:35:54] [Render thread/INFO]: [voicechat] Closing audio channel for 6fb801dd-1356-4609-80f0-14ace15197dd [14:35:54] [AudioChannelThread-6fb801dd-1356-4609-80f0-14ace15197dd/INFO]: [voicechat] Closed audio channel for 6fb801dd-1356-4609-80f0-14ace15197dd [14:35:54] [Render thread/INFO]: [voicechat] Stopping microphone thread [14:35:54] [Render thread/INFO]: [voicechat] Disconnecting voicechat [14:35:54] [AudioChannelThread-6fb801dd-1356-4609-80f0-14ace15197dd/INFO]: [voicechat] Closing audio channel for 6fb801dd-1356-4609-80f0-14ace15197dd [14:35:54] [AudioChannelThread-6fb801dd-1356-4609-80f0-14ace15197dd/INFO]: [voicechat] Closed audio channel for 6fb801dd-1356-4609-80f0-14ace15197dd [14:35:54] [Render thread/INFO]: Stopping worker threads [14:35:54] [Render thread/WARN]: Client disconnected with reason: Internal Exception: io.netty.handler.codec.DecoderException: Failed to decode packet 'clientbound/minecraft:custom_payload'