Periodically throws it off the server
KryptonReforged-0.2.1.jar
PacketFixer-forge-1.19.2-1.2.6.jar

Packet Fixer:
[20:49:15] [main/WARN]: For can't fit X into 3 error fix. Delete Krypton or Pluto.
[20:49:15] [main/WARN]: For can't fit X into 3 error fix. Delete Krypton or Pluto.

[20:53:19] [Netty Server IO #4/ERROR]: Error receiving packet 80
java.util.ConcurrentModificationException: null
at com.google.common.collect.LinkedHashMultimap$ValueSet$1.checkForComodification(LinkedHashMultimap.java:420) ~[guava-31.0.1-jre.jar%23121!/:?]
at com.google.common.collect.LinkedHashMultimap$ValueSet$1.hasNext(LinkedHashMultimap.java:426) ~[guava-31.0.1-jre.jar%23121!/:?]
at com.google.common.collect.AbstractMapBasedMultimap$WrappedCollection$WrappedIterator.hasNext(AbstractMapBasedMultimap.java:466) ~[guava-31.0.1-jre.jar%23121!/:?]
at net.minecraft.nbt.NbtUtils.m_129230_(NbtUtils.java:114) ~[client-1.19.2-20220805.130853-srg.jar%23721!/:?]
at com.mrbysco.distantfriends.registry.FriendSerializers$1.write(FriendSerializers.java:22) ~[DistantFriends-1.19.2-0.2.3.jar%23515!/:0.2.3]
at com.mrbysco.distantfriends.registry.FriendSerializers$1.m_6856_(FriendSerializers.java:18) ~[DistantFriends-1.19.2-0.2.3.jar%23515!/:0.2.3]
at net.minecraft.network.syncher.SynchedEntityData.m_135367_(SynchedEntityData.java:196) ~[client-1.19.2-20220805.130853-srg.jar%23721!/:?]
at net.minecraft.network.syncher.SynchedEntityData.m_135358_(SynchedEntityData.java:140) ~[client-1.19.2-20220805.130853-srg.jar%23721!/:?]
at net.minecraft.network.protocol.game.ClientboundSetEntityDataPacket.m_5779_(ClientboundSetEntityDataPacket.java:34) ~[client-1.19.2-20220805.130853-srg.jar%23721!/:?]
at net.minecraft.network.PacketEncoder.encode(PacketEncoder.java:45) [client-1.19.2-20220805.130853-srg.jar%23721!/:?]
at net.minecraft.network.PacketEncoder.encode(PacketEncoder.java:14) [client-1.19.2-20220805.130853-srg.jar%23721!/:?]
at io.netty.handler.codec.MessageToByteEncoder.write(MessageToByteEncoder.java:107) [netty-codec-4.1.77.Final.jar%23114!/:4.1.77.Final]
at io.netty.channel.AbstractChannelHandlerContext.invokeWrite0(AbstractChannelHandlerContext.java:717) [netty-transport-4.1.77.Final.jar%23117!/:4.1.77.Final]
at io.netty.channel.AbstractChannelHandlerContext.invokeWrite(AbstractChannelHandlerContext.java:709) [netty-transport-4.1.77.Final.jar%23117!/:4.1.77.Final]
at io.netty.channel.AbstractChannelHandlerContext.write(AbstractChannelHandlerContext.java:792) [netty-transport-4.1.77.Final.jar%23117!/:4.1.77.Final]
at io.netty.channel.AbstractChannelHandlerContext.write(AbstractChannelHandlerContext.java:702) [netty-transport-4.1.77.Final.jar%23117!/:4.1.77.Final]
at io.netty.handler.codec.MessageToMessageEncoder.write(MessageToMessageEncoder.java:110) [netty-codec-4.1.77.Final.jar%23114!/:4.1.77.Final]
at io.netty.channel.AbstractChannelHandlerContext.invokeWrite0(AbstractChannelHandlerContext.java:717) [netty-transport-4.1.77.Final.jar%23117!/:4.1.77.Final]
at io.netty.channel.AbstractChannelHandlerContext.invokeWrite(AbstractChannelHandlerContext.java:709) [netty-transport-4.1.77.Final.jar%23117!/:4.1.77.Final]
at io.netty.channel.AbstractChannelHandlerContext$WriteTask.run(AbstractChannelHandlerContext.java:1069) [netty-transport-4.1.77.Final.jar%23117!/:4.1.77.Final]
at io.netty.util.concurrent.AbstractEventExecutor.runTask(AbstractEventExecutor.java:174) [netty-common-4.1.77.Final.jar%23112!/:4.1.77.Final]
at io.netty.util.concurrent.AbstractEventExecutor.safeExecute(AbstractEventExecutor.java:167) [netty-common-4.1.77.Final.jar%23112!/:4.1.77.Final]
at io.netty.util.concurrent.SingleThreadEventExecutor.runAllTasks(SingleThreadEventExecutor.java:470) [netty-common-4.1.77.Final.jar%23112!/:4.1.77.Final]
at io.netty.channel.nio.NioEventLoop.run(NioEventLoop.java:503) [netty-transport-4.1.77.Final.jar%23117!/:4.1.77.Final]
at io.netty.util.concurrent.SingleThreadEventExecutor$4.run(SingleThreadEventExecutor.java:995) [netty-common-4.1.77.Final.jar%23112!/:4.1.77.Final]
at io.netty.util.internal.ThreadExecutorMap$2.run(ThreadExecutorMap.java:74) [netty-common-4.1.77.Final.jar%23112!/:4.1.77.Final]
at java.lang.Thread.run(Unknown Source) [?:?]