• This issue is not solved in a development build

Describe the bug
I was just trying to install ProtocolLib 5.4.3 to my Spigot 1.20.4 server and got the following error

[11:27:56] [Server thread/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.IllegalArgumentException: Unable to find a field that matches {modifiers=[required: 10000, banned: 1000], type={ type input instanceof interface java.util.Map }} at com.comphenix.protocol.reflect.FuzzyReflection.getField(FuzzyReflection.java:352) at com.comphenix.protocol.injector.packet.PacketRegistry.createNewRegister(PacketRegistry.java:188) at com.comphenix.protocol.injector.packet.PacketRegistry.initialize(PacketRegistry.java:292) at com.comphenix.protocol.injector.packet.PacketRegistry.getClientPacketTypes(PacketRegistry.java:327) at com.comphenix.protocol.injector.PacketFilterManager.<init>(PacketFilterManager.java:120) at com.comphenix.protocol.injector.PacketFilterBuilder.build(PacketFilterBuilder.java:121) at com.comphenix.protocol.ProtocolLib.onLoad(ProtocolLib.java:183) at org.bukkit.craftbukkit.v1_20_R3.CraftServer.loadPlugins(CraftServer.java:435) at net.minecraft.server.dedicated.DedicatedServer.e(DedicatedServer.java:219) at net.minecraft.server.MinecraftServer.w(MinecraftServer.java:1000) at net.minecraft.server.MinecraftServer.lambda$0(MinecraftServer.java:304) at java.base/java.lang.Thread.run(Thread.java:1583) Dump: Parameters: [NULL] Sender: com.comphenix.protocol.ProtocolLib@1f3cc280[ statistics=<null> packetTask=<null> tickCounter=0 configExpectedMod=-1 updater=com.comphenix.protocol.updater.SpigotUpdater@25044a6e redirectHandler=<null> scheduler=com.comphenix.protocol.scheduler.DefaultScheduler@5cd5b48c commandProtocol=<null> commandPacket=<null> commandFilter=<null> packetLogging=<null> skipDisable=false isEnabled=false loader=org.bukkit.plugin.java.JavaPluginLoader@6684cfed server=CraftServer{serverName=CraftBukkit,serverVersion=4039-Spigot-c198da2-4c687f2,minecraftVersion=1.20.4} file=plugins/ProtocolLib.jar description=org.bukkit.plugin.PluginDescriptionFile@62858308 dataFolder=plugins/ProtocolLib classLoader=org.bukkit.plugin.java.PluginClassLoader@1bbb20fd naggable=true newConfig=YamlConfiguration[path='', root='YamlConfiguration'] configFile=plugins/ProtocolLib/config.yml logger=org.bukkit.plugin.PluginLogger@aced212 ] Version: ProtocolLib v5.1.0 Java Version: 21.0.1 Server: 4039-Spigot-c198da2-4c687f2 (MC: 1.20.4)

To Reproduce
unsure

Expected behavior
I expected it to load properly

Version Info
since plugin didnt load command doesnt work

As I see in your log files, you use ProtocolLib 5.1.0, which is not compatible with Minecraft 1.20.4.
Use the latest development build instead: https://ci.dmulloy2.net/job/ProtocolLib//lastBuild/