[Netty Server IO #1/ERROR] [minecraft/NettyPacketEncoder]: Error encoding packet
com.google.gson.JsonSyntaxException: com.google.gson.stream.MalformedJsonException: Use JsonReader.setLenient(true) to accept malformed JSON at line 1 column 1 path $
        at com.google.gson.internal.Streams.parse(Streams.java:60) ~[server-1.16.5-20210115.111550-extra.jar:?] {}
        at com.google.gson.internal.bind.TreeTypeAdapter.read(TreeTypeAdapter.java:65) ~[server-1.16.5-20210115.111550-extra.jar:?] {}
        at net.minecraft.util.JSONUtils.func_188173_a(SourceFile:493) ~[?:?] {re:classloading}
        at net.minecraft.util.JSONUtils.func_188176_a(SourceFile:517) ~[?:?] {re:classloading}
        at net.minecraft.util.text.ITextComponent$Serializer.func_240643_a_(SourceFile:350) ~[?:?] {re:mixin,re:classloading,pl:mixin:APP:mixins.sponge.core.json:network.chat.Component_SerializerMixin,pl:mixin:A}
        at net.minecraft.network.PacketBuffer.bridge$renderItemComponents(PacketBuffer.java:2469) ~[?:?] {re:mixin,re:classloading,pl:mixin:APP:mixins.spongeforge.core.json:network.FriendlyByteBufMixin_Forge,pl:mixin:APP:mixins.sponge.api.json:minecraft.network.FriendlyByteBufMixin_API,pl:mixin:APP:mixins.sponge.core.json:network.FriendlyByteBufMixin,pl:mixin:A}
        at net.minecraft.network.PacketBuffer.redirect$zpi000$renderItemComponents(PacketBuffer.java:1222) ~[?:?] {re:mixin,re:classloading,pl:mixin:APP:mixins.spongeforge.core.json:network.FriendlyByteBufMixin_Forge,pl:mixin:APP:mixins.sponge.api.json:minecraft.network.FriendlyByteBufMixin_API,pl:mixin:APP:mixins.sponge.core.json:network.FriendlyByteBufMixin,pl:mixin:A}
        at net.minecraft.network.PacketBuffer.writeItemStack(PacketBuffer.java:311) ~[?:?] {re:mixin,re:classloading,pl:mixin:APP:mixins.spongeforge.core.json:network.FriendlyByteBufMixin_Forge,pl:mixin:APP:mixins.sponge.api.json:minecraft.network.FriendlyByteBufMixin_API,pl:mixin:APP:mixins.sponge.core.json:network.FriendlyByteBufMixin,pl:mixin:A}
        at net.minecraft.network.PacketBuffer.func_150788_a(PacketBuffer.java:290) ~[?:?] {re:mixin,re:classloading,pl:mixin:APP:mixins.spongeforge.core.json:network.FriendlyByteBufMixin_Forge,pl:mixin:APP:mixins.sponge.api.json:minecraft.network.FriendlyByteBufMixin_API,pl:mixin:APP:mixins.sponge.core.json:network.FriendlyByteBufMixin,pl:mixin:A}
        at net.minecraft.item.MerchantOffers.func_222196_a(SourceFile:49) ~[?:?] {re:mixin,re:classloading}
        at net.minecraft.network.play.server.SMerchantOffersPacket.func_148840_b(SourceFile:43) ~[?:?] {re:classloading}        at net.minecraft.network.NettyPacketEncoder.encode(NettyPacketEncoder.java:38) ~[?:?] {re:mixin,re:classloading,pl:mixin:APP:mixins.sponge.core.json:network.PacketEncoderMixin,pl:mixin:A}
        at net.minecraft.network.NettyPacketEncoder.encode(NettyPacketEncoder.java:12) ~[?:?] {re:mixin,re:classloading,pl:mixin:APP:mixins.sponge.core.json:network.PacketEncoderMixin,pl:mixin:A}
        at io.netty.handler.codec.MessageToByteEncoder.write(MessageToByteEncoder.java:107) ~[server-1.16.5-20210115.111550-extra.jar:?] {re:mixin}
        at io.netty.channel.AbstractChannelHandlerContext.invokeWrite0(AbstractChannelHandlerContext.java:738) ~[server-1.16.5-20210115.111550-extra.jar:?] {}
        at io.netty.channel.AbstractChannelHandlerContext.invokeWrite(AbstractChannelHandlerContext.java:730) ~[server-1.16.5-20210115.111550-extra.jar:?] {}
        at io.netty.channel.AbstractChannelHandlerContext.write(AbstractChannelHandlerContext.java:816) ~[server-1.16.5-20210115.111550-extra.jar:?] {}
        at io.netty.channel.AbstractChannelHandlerContext.write(AbstractChannelHandlerContext.java:723) ~[server-1.16.5-20210115.111550-extra.jar:?] {}
        at io.netty.handler.codec.MessageToMessageEncoder.write(MessageToMessageEncoder.java:111) ~[server-1.16.5-20210115.111550-extra.jar:?] {}
        at io.netty.channel.AbstractChannelHandlerContext.invokeWrite0(AbstractChannelHandlerContext.java:738) ~[server-1.16.5-20210115.111550-extra.jar:?] {}
        at io.netty.channel.AbstractChannelHandlerContext.invokeWriteAndFlush(AbstractChannelHandlerContext.java:801) ~[server-1.16.5-20210115.111550-extra.jar:?] {}
        at io.netty.channel.AbstractChannelHandlerContext.write(AbstractChannelHandlerContext.java:814) ~[server-1.16.5-20210115.111550-extra.jar:?] {}
        at io.netty.channel.AbstractChannelHandlerContext.writeAndFlush(AbstractChannelHandlerContext.java:794) ~[server-1.16.5-20210115.111550-extra.jar:?] {}
        at io.netty.channel.AbstractChannelHandlerContext.writeAndFlush(AbstractChannelHandlerContext.java:831) ~[server-1.16.5-20210115.111550-extra.jar:?] {}
        at io.netty.channel.DefaultChannelPipeline.writeAndFlush(DefaultChannelPipeline.java:1071) ~[server-1.16.5-20210115.111550-extra.jar:?] {}
        at io.netty.channel.AbstractChannel.writeAndFlush(AbstractChannel.java:300) ~[server-1.16.5-20210115.111550-extra.jar:?] {}
        at net.minecraft.network.NetworkManager.lambda$sendPacket$5(NetworkManager.java:196) ~[?:?] {re:mixin,pl:runtimedistcleaner:A,re:classloading,pl:mixin:APP:mixins.sponge.accessors.json:network.ConnectionAccessor,pl:mixin:APP:mixins.sponge.core.json:network.ConnectionMixin,pl:mixin:A,pl:runtimedistcleaner:A}
        at io.netty.util.concurrent.AbstractEventExecutor.safeExecute(AbstractEventExecutor.java:163) [server-1.16.5-20210115.111550-extra.jar:?] {}
        at io.netty.util.concurrent.SingleThreadEventExecutor.runAllTasks(SingleThreadEventExecutor.java:404) [server-1.16.5-20210115.111550-extra.jar:?] {}
        at io.netty.channel.nio.NioEventLoop.run(NioEventLoop.java:465) [server-1.16.5-20210115.111550-extra.jar:?] {}
        at io.netty.util.concurrent.SingleThreadEventExecutor$5.run(SingleThreadEventExecutor.java:884) [server-1.16.5-20210115.111550-extra.jar:?] {}
        at java.lang.Thread.run(Thread.java:834) [?:?] {}
Caused by: com.google.gson.stream.MalformedJsonException: Use JsonReader.setLenient(true) to accept malformed JSON at line 1 column 1 path $
        at com.google.gson.stream.JsonReader.syntaxError(JsonReader.java:1559) ~[server-1.16.5-20210115.111550-extra.jar:?] {}
        at com.google.gson.stream.JsonReader.checkLenient(JsonReader.java:1401) ~[server-1.16.5-20210115.111550-extra.jar:?] {}
        at com.google.gson.stream.JsonReader.doPeek(JsonReader.java:593) ~[server-1.16.5-20210115.111550-extra.jar:?] {}        at com.google.gson.stream.JsonReader.peek(JsonReader.java:425) ~[server-1.16.5-20210115.111550-extra.jar:?] {}
        at com.google.gson.internal.Streams.parse(Streams.java:46) ~[server-1.16.5-20210115.111550-extra.jar:?] {}
        ... 31 more
[21:37:34] [Server thread/INFO] [minecraft/ServerPlayNetHandler]: user lost connection: Internal Exception: io.netty.handler.codec.EncoderException: com.google.gson.JsonSyntaxException: com.google.gson.stream.MalformedJsonException: Use JsonReader.setLenient(true) to accept malformed JSON at line 1 column 1 path $