• This issue is not solved in a development
• Stack Trace:
  java.lang.IllegalArgumentException: Unable to find a field null with the type com.mojang.authlib.GameProfile in net.minecraft.network.protocol.login.PacketLoginInStart
  at ProtocolLib.jar//com.comphenix.protocol.reflect.FuzzyReflection.getFieldByType(FuzzyReflection.java:397)
  at ProtocolLib.jar//com.comphenix.protocol.reflect.accessors.Accessors.getFieldAccessor(Accessors.java:57)
  at ProtocolLib.jar//com.comphenix.protocol.injector.netty.ChannelInjector.handleLogin(ChannelInjector.java:658)
  at ProtocolLib.jar//com.comphenix.protocol.injector.netty.ChannelInjector.decode(ChannelInjector.java:591)
  at io.netty.handler.codec.ByteToMessageDecoder.decodeRemovalReentryProtection(ByteToMessageDecoder.java:510)
  at io.netty.handler.codec.ByteToMessageDecoder.callDecode(ByteToMessageDecoder.java:449)
  at io.netty.handler.codec.ByteToMessageDecoder.channelRead(ByteToMessageDecoder.java:279)
  at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:379)
  at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:365)
  at io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:357)
  at ProtocolLib.jar//com.comphenix.protocol.injector.netty.ChannelInjector$2.channelRead(ChannelInjector.java:292)
  at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:379)
  at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:365)
  at io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:357)
  at io.netty.handler.codec.ByteToMessageDecoder.fireChannelRead(ByteToMessageDecoder.java:327)
  at io.netty.handler.codec.ByteToMessageDecoder.channelRead(ByteToMessageDecoder.java:299)
  at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:379)
  at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:365)
  at io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:357)
  at net.minecraft.server.network.LegacyPingHandler.channelRead(LegacyPingHandler.java:120)
  at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:379)
  at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:365)
  at io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:357)
  at io.netty.handler.timeout.IdleStateHandler.channelRead(IdleStateHandler.java:286)
  at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:379)
  at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:365)
  at io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:357)
  at io.netty.handler.flush.FlushConsolidationHandler.channelRead(FlushConsolidationHandler.java:152)
  at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:379)
  at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:365)
  at io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:357)
  at io.netty.channel.DefaultChannelPipeline$HeadContext.channelRead(DefaultChannelPipeline.java:1410)
  at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:379)
  at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:365)
  at io.netty.channel.DefaultChannelPipeline.fireChannelRead(DefaultChannelPipeline.java:919)
  at io.netty.channel.local.LocalChannel.readInbound(LocalChannel.java:299)
  at io.netty.channel.local.LocalChannel.finishPeerRead0(LocalChannel.java:445)
  at io.netty.channel.local.LocalChannel.access$400(LocalChannel.java:50)
  at io.netty.channel.local.LocalChannel$5.run(LocalChannel.java:403)
  at io.netty.util.concurrent.AbstractEventExecutor.runTask(AbstractEventExecutor.java:174)
  at io.netty.channel.DefaultEventLoop.run(DefaultEventLoop.java:54)
  at io.netty.util.concurrent.SingleThreadEventExecutor$4.run(SingleThreadEventExecutor.java:995)
  at io.netty.util.internal.ThreadExecutorMap$2.run(ThreadExecutorMap.java:74)
  at io.netty.util.concurrent.FastThreadLocalRunnable.run(FastThreadLocalRunnable.java:30)
  at java.base/java.lang.Thread.run(Thread.java:833)
  Dump:
  Parameters:
  io.netty.buffer.PooledUnsafeDirectByteBuf@49f3e2c7[
  memoryAddress=139733741188064
  recyclerHandle=io.netty.util.Recycler$DefaultHandle@f04b0ad
  chunk=Chunk(71458da8: 1%, 16384/4194304)
  handle=30064771072
  memory=java.nio.DirectByteBuffer[pos=0 lim=4194304 cap=4194304]
  offset=0
  length=18
  maxLength=32
  cache=io.netty.buffer.PoolThreadCache@265017dd
  tmpNioBuf=
  allocator=PooledByteBufAllocator(directByDefault: true)
  refCnt=2
  readerIndex=18
  writerIndex=18
  markedReaderIndex=0
  markedWriterIndex=0
  maxCapacity=2147483647
  ]
  manager:
  com.comphenix.protocol.injector.PacketFilterManager@5ac86b73[
  unhookTask=com.comphenix.protocol.injector.DelayedSingleTask@73d854f
  packetListeners=[]
  packetInjector=com.comphenix.protocol.injector.netty.ProtocolInjector$5@21f5848a
  playerInjection=com.comphenix.protocol.injector.netty.ProtocolInjector$4@481f7fd2
  inputBufferedPackets=[]
  recievedListeners=com.comphenix.protocol.injector.SortedPacketListenerList@51950651
  sendingListeners=com.comphenix.protocol.injector.SortedPacketListenerList@3ae9f6d1
  hasClosed=false
  classLoader=PluginClassLoader{plugin=ProtocolLib v4.8.0, pluginEnabled=true, url=plugins/ProtocolLib.jar}
  reporter=com.comphenix.protocol.ProtocolLib$1@3735e4d2
  server=CraftServer{serverName=Paper,serverVersion=git-Paper-81,minecraftVersion=1.19}
  library=ProtocolLib v4.8.0
  asyncFilterManager=com.comphenix.protocol.async.AsyncFilterManager@7d39c54a
  knowsServerPackets=true
  knowsClientPackets=true
  phaseLoginCount=0
  phasePlayingCount=0
  packetCreation=false
  nettyInjector=com.comphenix.protocol.injector.netty.ProtocolInjector@1804bfe3
  pluginVerifier=com.comphenix.protocol.injector.PluginVerifier@fda0e4a
  hasRecycleDistance=true
  minecraftVersion=(MC: 1.19.0)
  debug=false
  ]
  Sender:
  com.comphenix.protocol.injector.netty.ChannelInjector@5b79556a[
  decodeBuffer=protected void com.viaversion.viaversion.bukkit.handlers.BukkitDecodeHandler.decode(io.netty.channel.ChannelHandlerContext,io.netty.buffer.ByteBuf,java.util.List) throws java.lang.Exception
  encodeBuffer=protected void com.viaversion.viaversion.bukkit.handlers.BukkitEncodeHandler.encode(io.netty.channel.ChannelHandlerContext,java.lang.Object,io.netty.buffer.ByteBuf) throws java.lang.Exception
  factory=com.comphenix.protocol.injector.netty.InjectionFactory@33845949
  player=com.comphenix.protocol.injector.server.TemporaryPlayerInvocationHandler@22478856
  updated=
  playerName=
  playerConnection=
  networkManager=net.minecraft.network.NetworkManager@5c2970c3
  originalChannel=org.geysermc.geyser.network.netty.ChannelWrapper@64c9f1ec
  channelField=VolatileField [accessor=DefaultFieldAccessor [field=public io.netty.channel.Channel net.minecraft.network.NetworkManager.m], container=net.minecraft.network.NetworkManager@5c2970c3, previous=org.geysermc.geyser.network.netty.ChannelWrapper@64c9f1ec, current=com.comphenix.protocol.injector.netty.ChannelInjector$3@3c62eed0, previousLoaded=true, currentSet=true, forceAccess=true]
  packetMarker={}
  currentEvent=
  finalEvent=
  unfilteredProcessedPackets=com.comphenix.protocol.injector.netty.PacketFilterQueue@2279c432
  vanillaDecoder=com.viaversion.viaversion.bukkit.handlers.BukkitDecodeHandler@354117d6
  vanillaEncoder=com.viaversion.viaversion.bukkit.handlers.BukkitEncodeHandler@751dd18d
  finishQueue=[]
  channelListener=com.comphenix.protocol.injector.netty.ProtocolInjector@1804bfe3
  processor=com.comphenix.protocol.injector.NetworkProcessor@3296b222
  injected=true
  closed=false
  cumulation=PooledUnsafeDirectByteBuf(ridx: 18, widx: 18, cap: 18)
  cumulator=io.netty.handler.codec.ByteToMessageDecoder$1@f54fc01
  singleDecode=false
  first=true
  firedChannelRead=false
  selfFiredChannelRead=true
  decodeState=1
  discardAfterReads=16
  numReads=0
  added=true
  ]
  Version:
  ProtocolLib v4.8.0
  Java Version:
  17.0.2
  Server:
  git-Paper-81 (MC: 1.19)

Use the dev build from https://ci.dmulloy2.net/job/ProtocolLib/lastSuccessfulBuild/ for 1.19 support