• This issue is not solved in a development build

Describe the bug
Plugin fail to load at startup of the server.

To Reproduce
Steps to reproduce the behavior:

1. Download paper-1.20.6-115.jar
2. Build ProtocolLib (b0c4b7f)
3. Add ProtocolLib-5.2.1-SNAPSHOT.jar to the server plugins.
4. Launch server
5. See the error on plugin load.

Expected behavior
Plugin should load with succes.

Version Info
/protocol dump don't work. But I have Java 21, the 1st stable 1.20.6 version of paper and the last build for ProtocolLib.

The stack trace

[19:52:26 ERROR]: [ProtocolLib] Error initializing plugin 'ProtocolLib-5.2.1-SNAPSHOT.jar' in folder 'plugins/.paper-remapped' (Is it up to date?)
java.lang.NoClassDefFoundError: net/bytebuddy/dynamic/scaffold/subclass/ConstructorStrategy
        at ProtocolLib-5.2.1-SNAPSHOT.jar/com.comphenix.protocol.ProtocolLib.onLoad(ProtocolLib.java:129) ~[ProtocolLib-5.2.1-SNAPSHOT.jar:?]
        at io.papermc.paper.plugin.storage.ServerPluginProviderStorage.processProvided(ServerPluginProviderStorage.java:59) ~[paper-1.20.6.jar:1.20.6-115-9d6f2cc]
        at io.papermc.paper.plugin.storage.ServerPluginProviderStorage.processProvided(ServerPluginProviderStorage.java:18) ~[paper-1.20.6.jar:1.20.6-115-9d6f2cc]
        at io.papermc.paper.plugin.storage.SimpleProviderStorage.enter(SimpleProviderStorage.java:39) ~[paper-1.20.6.jar:1.20.6-115-9d6f2cc]
        at io.papermc.paper.plugin.entrypoint.LaunchEntryPointHandler.enter(LaunchEntryPointHandler.java:36) ~[paper-1.20.6.jar:1.20.6-115-9d6f2cc]
        at org.bukkit.craftbukkit.CraftServer.loadPlugins(CraftServer.java:510) ~[paper-1.20.6.jar:1.20.6-115-9d6f2cc]
        at net.minecraft.server.dedicated.DedicatedServer.initServer(DedicatedServer.java:286) ~[paper-1.20.6.jar:1.20.6-115-9d6f2cc]
        at net.minecraft.server.MinecraftServer.runServer(MinecraftServer.java:1136) ~[paper-1.20.6.jar:1.20.6-115-9d6f2cc]
        at net.minecraft.server.MinecraftServer.lambda$spin$0(MinecraftServer.java:323) ~[paper-1.20.6.jar:1.20.6-115-9d6f2cc]
        at java.base/java.lang.Thread.run(Thread.java:1583) ~[?:?]
Caused by: java.lang.ClassNotFoundException: net.bytebuddy.dynamic.scaffold.subclass.ConstructorStrategy
        at org.bukkit.plugin.java.PluginClassLoader.loadClass0(PluginClassLoader.java:197) ~[paper-api-1.20.6-R0.1-SNAPSHOT.jar:?]
        at org.bukkit.plugin.java.PluginClassLoader.loadClass(PluginClassLoader.java:164) ~[paper-api-1.20.6-R0.1-SNAPSHOT.jar:?]
        at java.base/java.lang.ClassLoader.loadClass(ClassLoader.java:526) ~[?:?]
        ... 10 more

Did not want to open another ticket for roughly the same issue, but here is my stack trace as well,

Version:
ProtocolLib v5.2.0-SNAPSHOT-679
Java Version:
21.0.3
Server:
1.20.6-124-0fcf3e3 (MC: 1.20.6)

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 ProtocolLib.jar//com.comphenix.protocol.reflect.FuzzyReflection.getField(FuzzyReflection.java:352) at ProtocolLib.jar//com.comphenix.protocol.injector.packet.PacketRegistry.createNewRegister(PacketRegistry.java:183) at ProtocolLib.jar//com.comphenix.protocol.injector.packet.PacketRegistry.initialize(PacketRegistry.java:334) at ProtocolLib.jar//com.comphenix.protocol.injector.packet.PacketRegistry.getClientPacketTypes(PacketRegistry.java:369) at ProtocolLib.jar//com.comphenix.protocol.injector.PacketFilterManager.<init>(PacketFilterManager.java:120) at ProtocolLib.jar//com.comphenix.protocol.injector.PacketFilterBuilder.build(PacketFilterBuilder.java:121) at ProtocolLib.jar//com.comphenix.protocol.ProtocolLib.onLoad(ProtocolLib.java:183) at io.papermc.paper.plugin.storage.ServerPluginProviderStorage.processProvided(ServerPluginProviderStorage.java:59) at io.papermc.paper.plugin.storage.ServerPluginProviderStorage.processProvided(ServerPluginProviderStorage.java:18) at io.papermc.paper.plugin.storage.SimpleProviderStorage.enter(SimpleProviderStorage.java:39) at io.papermc.paper.plugin.entrypoint.LaunchEntryPointHandler.enter(LaunchEntryPointHandler.java:36) at org.bukkit.craftbukkit.CraftServer.loadPlugins(CraftServer.java:510) at net.minecraft.server.dedicated.DedicatedServer.initServer(DedicatedServer.java:286) at net.minecraft.server.MinecraftServer.runServer(MinecraftServer.java:1136) at net.minecraft.server.MinecraftServer.lambda$spin$0(MinecraftServer.java:323) at java.base/java.lang.Thread.run(Thread.java:1583) Dump: Parameters: [NULL] Sender: com.comphenix.protocol.ProtocolLib@34be4d6c[ statistics=<null> packetTask=<null> tickCounter=0 configExpectedMod=-1 updater=com.comphenix.protocol.updater.SpigotUpdater@335b84f8 redirectHandler=<null> scheduler=com.comphenix.protocol.scheduler.DefaultScheduler@75486ad2 commandProtocol=<null> commandPacket=<null> commandFilter=<null> packetLogging=<null> skipDisable=false isEnabled=false loader=io.papermc.paper.plugin.manager.DummyBukkitPluginLoader@a80f09d server=CraftServer{serverName=Paper,serverVersion=1.20.6-124-0fcf3e3,minecraftVersion=1.20.6} file=plugins/.paper-remapped/ProtocolLib.jar description=org.bukkit.plugin.PluginDescriptionFile@7c8e9743 pluginMeta=org.bukkit.plugin.PluginDescriptionFile@7c8e9743 dataFolder=plugins/ProtocolLib classLoader=PluginClassLoader{plugin=ProtocolLib v5.2.0-SNAPSHOT-679, pluginEnabled=false, url=plugins/.paper-remapped/ProtocolLib.jar} naggable=true newConfig=YamlConfiguration[path='', root='YamlConfiguration'] configFile=plugins/ProtocolLib/config.yml logger=com.destroystokyo.paper.utils.PaperPluginLogger@27c7934d lifecycleEventManager=io.papermc.paper.plugin.lifecycle.event.PaperLifecycleEventManager@45460e46 allowsLifecycleRegistration=true ] Version: ProtocolLib v5.2.0-SNAPSHOT-679 Java Version: 21.0.3 Server: 1.20.6-124-0fcf3e3 (MC: 1.20.6)

@McJones9631 ProtocolLib v5.2.0-SNAPSHOT-679 is not the latest dev build...

As @Jeppa said, not in the latest, obtain it here

@HydrolienF it looks like you are not using the correct build task. You have to use gradlew shadowJar. This should give you a bigger jar that should work.

@0utplay Ok thanks I will try and let you know.