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-4.8.0.jar//com.comphenix.protocol.reflect.FuzzyReflection.getFieldByType(FuzzyReflection.java:397)
at ProtocolLib-4.8.0.jar//com.comphenix.protocol.reflect.accessors.Accessors.getFieldAccessor(Accessors.java:57)
at ProtocolLib-4.8.0.jar//com.comphenix.protocol.injector.netty.ChannelInjector.handleLogin(ChannelInjector.java:658)
at ProtocolLib-4.8.0.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-4.8.0.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.MessageToMessageDecoder.channelRead(MessageToMessageDecoder.java:103)
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.fireChannelRead(ByteToMessageDecoder.java:314)
at io.netty.handler.codec.ByteToMessageDecoder.callDecode(ByteToMessageDecoder.java:435)
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 net.minecraft.server.network.LegacyPingHandler.channelRead(LegacyPingHandler.java:122)
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.epoll.AbstractEpollStreamChannel$EpollStreamUnsafe.epollInReady(AbstractEpollStreamChannel.java:800)
at io.netty.channel.epoll.EpollEventLoop.processReady(EpollEventLoop.java:487)
at io.netty.channel.epoll.EpollEventLoop.run(EpollEventLoop.java:385)
at io.netty.util.concurrent.SingleThreadEventExecutor$4.run(SingleThreadEventExecutor.java:995)
at io.netty.util.internal.ThreadExecutorMap$2.run(ThreadExecutorMap.java:74)
at java.base/java.lang.Thread.run(Thread.java:833)
Dump:
Parameters:
io.netty.buffer.PooledUnsafeDirectByteBuf@a60776e[
memoryAddress=140409863006272
recyclerHandle=NOOP_HANDLE
chunk=Chunk(68b1aa70: 1%, 40960/4194304)
handle=1125929971613697
memory=java.nio.DirectByteBuffer[pos=0 lim=4194304 cap=4194304]
offset=16640
length=256
maxLength=256
cache=io.netty.buffer.PoolThreadCache@108b74e0
tmpNioBuf=
allocator=PooledByteBufAllocator(directByDefault: true)
refCnt=2
readerIndex=17
writerIndex=17
markedReaderIndex=0
markedWriterIndex=0
maxCapacity=2147483647
]
manager:
com.comphenix.protocol.injector.PacketFilterManager@2e84afe9[
unhookTask=com.comphenix.protocol.injector.DelayedSingleTask@3e2ca733
packetListeners=[PacketAdapter[plugin=Citizens, sending=ListeningWhitelist[priority=MONITOR, packets=[ENTITY_LOOK[class=PacketPlayOutEntityLook, id=43], ENTITY_HEAD_ROTATION[class=PacketPlayOutEntityHeadRotation, id=62]], gamephase=PLAYING, options=[]], receiving=EMPTY_WHITELIST], PacketAdapter[plugin=AdvancedEnchantments, sending=EMPTY_WHITELIST, receiving=ListeningWhitelist[priority=HIGHEST, packets=[USE_ENTITY[class=PacketPlayInUseEntity, id=13]], gamephase=PLAYING, options=[]]], PacketAdapter[plugin=Images, sending=EMPTY_WHITELIST, receiving=ListeningWhitelist[priority=NORMAL, packets=[SET_CREATIVE_SLOT[class=PacketPlayInSetCreativeSlot, id=40], USE_ENTITY[class=PacketPlayInUseEntity, id=13]], gamephase=PLAYING, options=[]]], PacketAdapter[plugin=SuperVanish, sending=ListeningWhitelist[priority=NORMAL, packets=[PLAYER_INFO[class=PacketPlayOutPlayerInfo, id=54]], gamephase=PLAYING, options=[]], receiving=EMPTY_WHITELIST], PacketAdapter[plugin=SuperVanish, sending=ListeningWhitelist[priority=LOW, packets=[ENTITY_METADATA[class=PacketPlayOutEntityMetadata, id=77], PLAYER_INFO[class=PacketPlayOutPlayerInfo, id=54], ABILITIES[class=ClientboundPlayerChatHeaderPacket, id=50]], gamephase=PLAYING, options=[]], receiving=EMPTY_WHITELIST], PacketAdapter[plugin=CMI, sending=ListeningWhitelist[priority=HIGH, packets=[UNLOAD_CHUNK[class=PacketPlayOutUnloadChunk, id=29]], gamephase=PLAYING, options=[]], receiving=EMPTY_WHITELIST], PacketAdapter[plugin=SuperVanish, sending=ListeningWhitelist[priority=HIGH, packets=[PLAYER_INFO[class=PacketPlayOutPlayerInfo, id=54]], gamephase=PLAYING, options=[]], receiving=EMPTY_WHITELIST], PacketAdapter[plugin=AdvancedEnchantments, sending=ListeningWhitelist[priority=HIGHEST, packets=[SPAWN_ENTITY[class=PacketPlayOutSpawnEntity, id=0]], gamephase=PLAYING, options=[]], receiving=EMPTY_WHITELIST], PacketAdapter[plugin=SuperVanish, sending=ListeningWhitelist[priority=NORMAL, packets=[OUT_SERVER_INFO[class=PacketStatusOutServerInfo, id=0]], gamephase=PLAYING, options=[]], receiving=EMPTY_WHITELIST], PacketAdapter[plugin=ItemJoin, sending=EMPTY_WHITELIST, receiving=ListeningWhitelist[priority=LOWEST, packets=[PICK_ITEM[class=PacketPlayInPickItem, id=23], AUTO_RECIPE[class=PacketPlayInAutoRecipe, id=24], CLOSE_WINDOW[class=PacketPlayInCloseWindow, id=9]], gamephase=PLAYING, options=[]]], PacketAdapter[plugin=SuperVanish, sending=ListeningWhitelist[priority=HIGH, packets=[TAB_COMPLETE[class=PacketPlayOutTabComplete, id=17]], gamephase=PLAYING, options=[]], receiving=EMPTY_WHITELIST]]
packetInjector=com.comphenix.protocol.injector.netty.ProtocolInjector$5@6da9066a
playerInjection=com.comphenix.protocol.injector.netty.ProtocolInjector$4@e75948b
inputBufferedPackets=[]
recievedListeners=com.comphenix.protocol.injector.SortedPacketListenerList@7a20ef1e
sendingListeners=com.comphenix.protocol.injector.SortedPacketListenerList@5c536144
hasClosed=false
classLoader=PluginClassLoader{plugin=ProtocolLib v4.8.0, pluginEnabled=true, url=plugins/ProtocolLib-4.8.0.jar}
reporter=com.comphenix.protocol.ProtocolLib$1@633162a7
server=CraftServer{serverName=Paper,serverVersion=git-Paper-307,minecraftVersion=1.19.2}
library=ProtocolLib v4.8.0
asyncFilterManager=com.comphenix.protocol.async.AsyncFilterManager@2139cfa7
knowsServerPackets=true
knowsClientPackets=true
phaseLoginCount=1
phasePlayingCount=11
packetCreation=false
nettyInjector=com.comphenix.protocol.injector.netty.ProtocolInjector@3b589909
pluginVerifier=com.comphenix.protocol.injector.PluginVerifier@6bf24d1f
hasRecycleDistance=true
minecraftVersion=(MC: 1.19.2)
debug=false
]
Sender:
com.comphenix.protocol.injector.netty.ChannelInjector@744c489b[
decodeBuffer=protected void net.minecraft.network.PacketDecoder.decode(io.netty.channel.ChannelHandlerContext,io.netty.buffer.ByteBuf,java.util.List) throws java.lang.Exception
encodeBuffer=protected void net.minecraft.network.PacketEncoder.encode(io.netty.channel.ChannelHandlerContext,java.lang.Object,io.netty.buffer.ByteBuf) throws java.lang.Exception
factory=com.comphenix.protocol.injector.netty.InjectionFactory@5ca740c0
player=com.comphenix.protocol.injector.server.TemporaryPlayerInvocationHandler@2d9380b4
updated=
playerName=
playerConnection=
networkManager=net.minecraft.network.NetworkManager@7be27a40
originalChannel=[id: 0xc7369b85, L:/172.18.0.16:25581 - R:/172.18.0.1:36014]
channelField=VolatileField [accessor=DefaultFieldAccessor [field=public io.netty.channel.Channel net.minecraft.network.NetworkManager.m], container=net.minecraft.network.NetworkManager@7be27a40, previous=[id: 0xc7369b85, L:/172.18.0.16:25581 - R:/172.18.0.1:36014], current=com.comphenix.protocol.injector.netty.ChannelInjector$3@64ae2f08, previousLoaded=true, currentSet=true, forceAccess=true]
packetMarker={}
currentEvent=
finalEvent=
unfilteredProcessedPackets=com.comphenix.protocol.injector.netty.PacketFilterQueue@55098509
vanillaDecoder=net.minecraft.network.PacketDecoder@3d51d592
vanillaEncoder=net.minecraft.network.PacketEncoder@4adc396c
finishQueue=[]
channelListener=com.comphenix.protocol.injector.netty.ProtocolInjector@3b589909
processor=com.comphenix.protocol.injector.NetworkProcessor@46277e67
injected=true
closed=false
cumulation=PooledUnsafeDirectByteBuf(ridx: 17, widx: 17, cap: 256)
cumulator=io.netty.handler.codec.ByteToMessageDecoder$1@234ce849
singleDecode=false
first=true
firedChannelRead=false
selfFiredChannelRead=true
decodeState=1
discardAfterReads=16
numReads=0
added=true
]
Version:
ProtocolLib v4.8.0
Java Version:
17.0.5
Server:
git-Paper-307 (MC: 1.19.2)

Try using version 5.0.0-SNAPSHOT, namely here: https://ci.dmulloy2.net/job/ProtocolLib/606/