[ProtocolLib] INTERNAL ERROR: Cannot perform automatic updates.
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.NullPointerException: Cannot invoke "com.comphenix.protocol.updater.Updater.isChecking()" because "this.updater" is null
at com.comphenix.protocol.ProtocolLib.checkUpdates(ProtocolLib.java:540)
at com.comphenix.protocol.ProtocolLib.lambda$createPacketTask$0(ProtocolLib.java:511)
at org.bukkit.craftbukkit.v1_20_R1.scheduler.CraftTask.run(CraftTask.java:77)
at org.bukkit.craftbukkit.v1_20_R1.scheduler.CraftScheduler.mainThreadHeartbeat(CraftScheduler.java:414)
at net.minecraft.server.MinecraftServer.b(MinecraftServer.java:1209)
at net.minecraft.server.dedicated.DedicatedServer.b(DedicatedServer.java:375)
at net.minecraft.server.MinecraftServer.a(MinecraftServer.java:1156)
at net.minecraft.server.MinecraftServer.w(MinecraftServer.java:981)
at net.minecraft.server.MinecraftServer.lambda$0(MinecraftServer.java:296)
at java.base/java.lang.Thread.run(Thread.java:1623)
Dump:
manager:
com.comphenix.protocol.injector.PacketFilterManager@19f0722f[
plugin=ProtocolLib v5.1.0-SNAPSHOT-661
server=CraftServer{serverName=CraftBukkit,serverVersion=3843-Bukkit-4be756e,minecraftVersion=1.20.1}
reporter=com.comphenix.protocol.ProtocolLib$1@79a33671
minecraftVersion=(MC: 1.20.1)
asyncFilterManager=com.comphenix.protocol.async.AsyncFilterManager@7f0c0292
pluginVerifier=com.comphenix.protocol.injector.PluginVerifier@65f76656
inboundListeners=com.comphenix.protocol.injector.SortedPacketListenerList@36e84d6a
outboundListeners=com.comphenix.protocol.injector.SortedPacketListenerList@5618e578
registeredListeners=[]
packetInjector=com.comphenix.protocol.injector.netty.manager.NetworkManagerPacketInjector@491f75bb
playerInjectionHandler=com.comphenix.protocol.injector.netty.manager.NetworkManagerPlayerInjector@17847f18
networkManagerInjector=com.comphenix.protocol.injector.netty.manager.NetworkManagerInjector@6373f39f
debug=false
closed=false
injected=true
]
Sender:
com.comphenix.protocol.ProtocolLib@7251f9ac[
statistics=com.comphenix.protocol.metrics.Statistics@40d1f8f0
packetTask=com.comphenix.protocol.scheduler.DefaultTask@7419234d
tickCounter=20
configExpectedMod=1
updater=
redirectHandler=com.comphenix.protocol.ProtocolLib$2@756bcd7e
scheduler=com.comphenix.protocol.scheduler.DefaultScheduler@3a32ad5b
commandProtocol=com.comphenix.protocol.CommandProtocol@78ce21b
commandPacket=com.comphenix.protocol.CommandPacket@59122ba9
commandFilter=com.comphenix.protocol.CommandFilter@72390dc8
packetLogging=com.comphenix.protocol.PacketLogging@5dce3ea1
skipDisable=false
isEnabled=true
loader=org.bukkit.plugin.java.JavaPluginLoader@3db29339
server=CraftServer{serverName=CraftBukkit,serverVersion=3843-Bukkit-4be756e,minecraftVersion=1.20.1}
file=plugins\ProtocolLib.jar
description=org.bukkit.plugin.PluginDescriptionFile@75b5a845
dataFolder=plugins\ProtocolLib
classLoader=org.bukkit.plugin.java.PluginClassLoader@2aed125c
naggable=true
newConfig=YamlConfiguration[path='', root='YamlConfiguration']
configFile=plugins\ProtocolLib\config.yml
logger=org.bukkit.plugin.PluginLogger@63cfb81a
]
Version:
ProtocolLib v5.1.0-SNAPSHOT-661
Java Version:
20.0.2
Server:
3843-Bukkit-4be756e (MC: 1.20.1)

I would really appreciate if somebody could suggest how do I fix this issue 🙂

Hi, I suspect that there is another error before the stack trace you uploaded in the log, probably at "Enabling ProtocolLib" or "Loading ProtcolLib". The error you send is likely a result of a previous error.
Please check your logs and send us any other errors from the log.

Also, I am not sure how well ProtocolLib is compatible with Java 20. Please try out Java 17 Hotspot and see if this resolves the error.