[22:59:07 INFO]: [ProtocolLib] Loading ProtocolLib v4.7.0
[22:59:08 ERROR]: [ProtocolLib] INTERNAL ERROR: Cannot load ProtocolLib.
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.ExceptionInInitializerError
at com.comphenix.protocol.injector.netty.ProtocolInjector.(ProtocolInjector.java:69)
at com.comphenix.protocol.injector.PacketFilterManager.(PacketFilterManager.java:202)
at com.comphenix.protocol.injector.PacketFilterBuilder.buildInternal(PacketFilterBuilder.java:185)
at com.comphenix.protocol.injector.PacketFilterBuilder.build(PacketFilterBuilder.java:177)
at com.comphenix.protocol.ProtocolLib.onLoad(ProtocolLib.java:203)
at org.bukkit.craftbukkit.v1_8_R3.CraftServer.loadPlugins(CraftServer.java:297)
at net.minecraft.server.v1_8_R3.DedicatedServer.init(DedicatedServer.java:198)
at net.minecraft.server.v1_8_R3.MinecraftServer.run(MinecraftServer.java:525)
at java.base/java.lang.Thread.run(Thread.java:1589)
Caused by: java.lang.UnsupportedOperationException: Cannot define class using reflection: Unsupported class file major version 63
at com.comphenix.net.bytebuddy.dynamic.loading.ClassInjector$UsingReflection$Dispatcher$Initializable$Unavailable.defineClass(ClassInjector.java:435)
at com.comphenix.net.bytebuddy.dynamic.loading.ClassInjector$UsingReflection.injectRaw(ClassInjector.java:251)
at com.comphenix.net.bytebuddy.dynamic.loading.ClassInjector$AbstractBase.inject(ClassInjector.java:110)
at com.comphenix.net.bytebuddy.dynamic.loading.ClassLoadingStrategy$Default$InjectionDispatcher.load(ClassLoadingStrategy.java:233)
at com.comphenix.net.bytebuddy.dynamic.loading.ClassLoadingStrategy$Default.load(ClassLoadingStrategy.java:144)
at com.comphenix.net.bytebuddy.dynamic.TypeResolutionStrategy$Passive.initialize(TypeResolutionStrategy.java:100)
at com.comphenix.net.bytebuddy.dynamic.DynamicType$Default$Unloaded.load(DynamicType.java:6292)
at com.comphenix.protocol.injector.server.TemporaryPlayerFactory.setupProxyPlayerConstructor(TemporaryPlayerFactory.java:187)
at com.comphenix.protocol.injector.server.TemporaryPlayerFactory.(TemporaryPlayerFactory.java:51)
... 9 more
Dump:
Parameters:
[NULL]
Sender:
com.comphenix.protocol.ProtocolLib@54ea0e8e[
statistics=
backgroundCompiler=
packetTask=-1
tickCounter=0
unhookTask=com.comphenix.protocol.injector.DelayedSingleTask@6f1665c6
configExpectedMod=-1
updater=com.comphenix.protocol.updater.SpigotUpdater@6b8c98d4
redirectHandler=
commandProtocol=
commandPacket=
commandFilter=
packetLogging=
skipDisable=false
isEnabled=false
loader=org.bukkit.plugin.java.JavaPluginLoader@46d22625
server=CraftServer{serverName=CraftBukkit,serverVersion=git-Spigot-21fe707-741a1bd,minecraftVersion=1.8.8}
file=plugins\ProtocolLib.jar
description=org.bukkit.plugin.PluginDescriptionFile@1eb4d808
dataFolder=plugins\ProtocolLib
classLoader=org.bukkit.plugin.java.PluginClassLoader@11e97c43
naggable=true
ebean=
newConfig=YamlConfiguration[path='', root='YamlConfiguration']
configFile=plugins\ProtocolLib\config.yml
logger=org.bukkit.plugin.PluginLogger@24b49b1d
]
Version:
ProtocolLib v4.7.0
Java Version:
19.0.1
Server:
git-Spigot-21fe707-741a1bd (MC: 1.8.8)

[22:59:08 INFO]: [ProtocolLib] Enabling ProtocolLib v4.7.0
[22:59:08 ERROR]: ******************************************************
[22:59:08 ERROR]: *** ProtocolLib does not support plugin reloaders! ***
[22:59:08 ERROR]: *** Please use the built-in reload command! ***
[22:59:08 ERROR]: ******************************************************
[22:59:08 INFO]: [ProtocolLib] Disabling ProtocolLib v4.7.0