[07:38:47] [Server thread/ERROR]: [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:533)
at com.comphenix.protocol.ProtocolLib.lambda$createPacketTask$0(ProtocolLib.java:504)
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(Unknown Source)
Dump:
manager:
com.comphenix.protocol.injector.PacketFilterManager@7d229492[
plugin=ProtocolLib v5.0.0
server=CraftServer{serverName=CraftBukkit,serverVersion=3815-Bukkit-9f64f0d,minecraftVersion=1.20.1}
reporter=com.comphenix.protocol.ProtocolLib$1@306d925b
minecraftVersion=(MC: 1.20.1)
asyncFilterManager=com.comphenix.protocol.async.AsyncFilterManager@2a6ba71f
pluginVerifier=com.comphenix.protocol.injector.PluginVerifier@438420c4
inboundListeners=com.comphenix.protocol.injector.SortedPacketListenerList@4075b51
outboundListeners=com.comphenix.protocol.injector.SortedPacketListenerList@5824fec0
registeredListeners=[]
packetInjector=com.comphenix.protocol.injector.netty.manager.NetworkManagerPacketInjector@2f00f984
playerInjectionHandler=com.comphenix.protocol.injector.netty.manager.NetworkManagerPlayerInjector@4de07ea0
networkManagerInjector=com.comphenix.protocol.injector.netty.manager.NetworkManagerInjector@7383799e
debug=false
closed=false
injected=true
]
Sender:
com.comphenix.protocol.ProtocolLib@c2e4bd0[
statistics=com.comphenix.protocol.metrics.Statistics@24ca4f08
packetTask=8
tickCounter=20
configExpectedMod=1
updater=
redirectHandler=com.comphenix.protocol.ProtocolLib$2@6a91304f
commandProtocol=com.comphenix.protocol.CommandProtocol@236eb0a
commandPacket=com.comphenix.protocol.CommandPacket@7cb85057
commandFilter=com.comphenix.protocol.CommandFilter@afcf2c7
packetLogging=com.comphenix.protocol.PacketLogging@698ca89f
skipDisable=false
isEnabled=true
loader=org.bukkit.plugin.java.JavaPluginLoader@5c57701f
server=CraftServer{serverName=CraftBukkit,serverVersion=3815-Bukkit-9f64f0d,minecraftVersion=1.20.1}
file=plugins/ProtocolLib.jar
description=org.bukkit.plugin.PluginDescriptionFile@6253b92a
dataFolder=plugins/ProtocolLib
classLoader=org.bukkit.plugin.java.PluginClassLoader@67cfee4c
naggable=true
newConfig=YamlConfiguration[path='', root='YamlConfiguration']
configFile=plugins/ProtocolLib/config.yml
logger=org.bukkit.plugin.PluginLogger@3109c58
]
Version:
ProtocolLib v5.0.0
Java Version:
17.0.7
Server:
3815-Bukkit-9f64f0d (MC: 1.20.1)

Update to the latest dev build for ProtocolLib 5.1.0 (https://ci.dmulloy2.net/job/ProtocolLib/654/artifact/build/libs/ProtocolLib.jar). Version 5.0.0 does not support MC 1.20.1