**Describe the error
Hello, look, when a player comes to the server, one message is displayed in the console, I'll attach it a little lower, I do not know what to do with it, but I realized one thing that I need to create a ticket on this platform. Please help me solve this problem.

The same error in the console:
[18:37:16 ERROR]: [ProtocolLib] INTERNAL ERROR: Cannot compile structure. Disabing compiler.

If this problem hasn't already been reported, please open a ticket

at https://github.com/dmulloy2/ProtocolLib/issues with the following data:

Stack Trace:

java.lang.reflect.InaccessibleObjectException: Unable to make protected final java.lang.Class java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) throws java.lang.ClassFormatError accessible: module java.base does not "opens java.lang" to unnamed module @5144362d

at java.base/java.lang.reflect.AccessibleObject.checkCanSetAccessible(AccessibleObject.java:357)

at java.base/java.lang.reflect.AccessibleObject.checkCanSetAccessible(AccessibleObject.java:297)

at java.base/java.lang.reflect.Method.checkCanSetAccessible(Method.java:199)

at java.base/java.lang.reflect.Method.setAccessible(Method.java:193)

at com.comphenix.protocol.reflect.compiler.StructureCompiler.generateClass(StructureCompiler.java:299)

at com.comphenix.protocol.reflect.compiler.StructureCompiler.compile(StructureCompiler.java:213)

at com.comphenix.protocol.reflect.compiler.BackgroundCompiler$2.call(BackgroundCompiler.java:204)

at java.base/java.util.concurrent.FutureTask.run(FutureTask.java:264)

at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1130)

at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:630)

at java.base/java.lang.Thread.run(Thread.java:831)

Dump:

Parameters:

com.comphenix.protocol.reflect.StructureModifier@2194afcf[

targetType=class net.minecraft.server.v1_16_R3.PacketPlayOutChat

target=

converter=

fieldType=class java.lang.Object

data=[private net.minecraft.server.v1_16_R3.IChatBaseComponent net.minecraft.server.v1_16_R3.PacketPlayOutChat.a, public net.kyori.adventure.text.Component net.minecraft.server.v1_16_R3.PacketPlayOutChat.adventure$message, public net.md_5.bungee.api.chat.BaseComponent[] net.minecraft.server.v1_16_R3.PacketPlayOutChat.components, private net.minecraft.server.v1_16_R3.ChatMessageType net.minecraft.server.v1_16_R3.PacketPlayOutChat.b, private java.util.UUID net.minecraft.server.v1_16_R3.PacketPlayOutChat.c]

defaultFields={public net.md_5.bungee.api.chat.BaseComponent[] net.minecraft.server.v1_16_R3.PacketPlayOutChat.components=2, private net.minecraft.server.v1_16_R3.ChatMessageType net.minecraft.server.v1_16_R3.PacketPlayOutChat.b=3, private java.util.UUID net.minecraft.server.v1_16_R3.PacketPlayOutChat.c=4}

subtypeCache={class java.util.UUID=StructureModifier[fieldType=class java.util.UUID, data=[private java.util.UUID net.minecraft.server.v1_16_R3.PacketPlayOutChat.c]]}

customConvertHandling=false

useStructureCompiler=true

]

manager:

com.comphenix.protocol.injector.PacketFilterManager@79708691[

unhookTask=com.comphenix.protocol.injector.DelayedSingleTask@7c1abca5

packetListeners=[PacketAdapter[plugin=HolographicExtension, sending=ListeningWhitelist[priority=NORMAL, packets=[ENTITY_METADATA[class=PacketPlayOutEntityMetadata, id=68]], gamephase=PLAYING, options=[]], receiving=EMPTY_WHITELIST], PacketAdapter[plugin=MyCommand, sending=EMPTY_WHITELIST, receiving=ListeningWhitelist[priority=NORMAL, packets=[UPDATE_SIGN[class=PacketPlayInUpdateSign, id=43]], gamephase=PLAYING, options=[]]], PacketAdapter[plugin=ConditionalEvents, sending=ListeningWhitelist[priority=HIGHEST, packets=[CHAT[class=PacketPlayOutChat, id=14]], gamephase=PLAYING, options=[]], receiving=EMPTY_WHITELIST], PacketAdapter[plugin=UltimateClans, sending=EMPTY_WHITELIST, receiving=ListeningWhitelist[priority=NORMAL, packets=[UPDATE_SIGN[class=PacketPlayInUpdateSign, id=43]], gamephase=PLAYING, options=[]]], PacketAdapter[plugin=SCore, sending=ListeningWhitelist[priority=HIGH, packets=[WINDOW_ITEMS[class=PacketPlayOutWindowItems, id=19]], gamephase=PLAYING, options=[]], receiving=EMPTY_WHITELIST], PacketAdapter[plugin=LiteBans, sending=ListeningWhitelist[priority=NORMAL, packets=[DISCONNECT[class=PacketLoginOutDisconnect, id=0]], gamephase=PLAYING, options=[ASYNC]], receiving=EMPTY_WHITELIST], PacketAdapter[plugin=SCore, sending=EMPTY_WHITELIST, receiving=ListeningWhitelist[priority=LOW, packets=[BLOCK_DIG[class=PacketPlayInBlockDig, id=27]], gamephase=PLAYING, options=[]]], PacketAdapter[plugin=LiteBans, sending=EMPTY_WHITELIST, receiving=ListeningWhitelist[priority=NORMAL, packets=[CHAT[class=PacketPlayInChat, id=3]], gamephase=PLAYING, options=[ASYNC]]], PacketAdapter[plugin=AntiRelog, sending=ListeningWhitelist[priority=LOWEST, packets=[SET_COOLDOWN[class=PacketPlayOutSetCooldown, id=22]], gamephase=PLAYING, options=[]], receiving=EMPTY_WHITELIST]]

packetInjector=com.comphenix.protocol.injector.netty.ProtocolInjector$5@78748e3e

playerInjection=com.comphenix.protocol.injector.netty.ProtocolInjector$4@7e0197e9

inputBufferedPackets=[]

recievedListeners=com.comphenix.protocol.injector.SortedPacketListenerList@3b8d2b6

sendingListeners=com.comphenix.protocol.injector.SortedPacketListenerList@2aeea9f0

hasClosed=false

classLoader=PluginClassLoader{plugin=ProtocolLib v4.6.0, pluginEnabled=true, url=plugins/protocollib-1_8-1_17 (1).jar}

reporter=com.comphenix.protocol.ProtocolLib$1@76b7d7ed

server=CraftServer{serverName=Paper,serverVersion=git-Paper-794,minecraftVersion=1.16.5}

library=ProtocolLib v4.6.0

asyncFilterManager=com.comphenix.protocol.async.AsyncFilterManager@4113f756

knowsServerPackets=true

knowsClientPackets=true

phaseLoginCount=1

phasePlayingCount=9

packetCreation=false

nettyInjector=com.comphenix.protocol.injector.netty.ProtocolInjector@51385dc2

pluginVerifier=com.comphenix.protocol.injector.PluginVerifier@241d0857

hasRecycleDistance=true

minecraftVersion=(MC: 1.16.5)

debug=false

]

Sender:

com.comphenix.protocol.reflect.compiler.BackgroundCompiler@1c91fb25[

listeners={com.comphenix.protocol.reflect.compiler.StructureCompiler$StructureKey@ea2385d3=[com.comphenix.protocol.reflect.compiler.BackgroundCompiler$1@6e3d44ef], com.comphenix.protocol.reflect.compiler.StructureCompiler$StructureKey@1676b261=[com.comphenix.protocol.injector.StructureCache$1@7df8d2a7]}

listenerLock=java.lang.Object@31eb32ff

compiler=com.comphenix.protocol.reflect.compiler.StructureCompiler@2230af34

enabled=false

shuttingDown=false

executor=java.util.concurrent.Executors$FinalizableDelegatedExecutorService@26ae9da1

reporter=com.comphenix.protocol.ProtocolLib$1@76b7d7ed

unknownPermGenBean=java.lang.Object@1d781e39

permGenBean=

disablePermGenFraction=0.65

]

Version:

ProtocolLib v4.6.0

Java Version:

16.0.2

Server:

git-Paper-794 (MC: 1.16.5)