Unable to change player name with 1.15.1

[SimonIT]

This exception is thrown if changePlayerName or updatePlayer is executed

org.bukkit.command.CommandException: Unhandled exception executing 'changeidentity:changeidentity peter_roelle' in de.simonit.changeidentity.commands.ChangeIdentityCommand(changeidentity)
	at org.bukkit.command.SimpleCommandMap.dispatch(SimpleCommandMap.java:152) ~[craftbukkit-1.15.1-R0.1-SNAPSHOT.jar:git-Bukkit-2d9db47]
	at org.bukkit.craftbukkit.v1_15_R1.CraftServer.dispatchCommand(CraftServer.java:690) ~[craftbukkit-1.15.1-R0.1-SNAPSHOT.jar:git-Bukkit-2d9db47]
	at net.minecraft.server.v1_15_R1.PlayerConnection.handleCommand(PlayerConnection.java:1606) ~[craftbukkit-1.15.1-R0.1-SNAPSHOT.jar:git-Bukkit-2d9db47]
	at net.minecraft.server.v1_15_R1.PlayerConnection.a(PlayerConnection.java:1460) ~[craftbukkit-1.15.1-R0.1-SNAPSHOT.jar:git-Bukkit-2d9db47]
	at net.minecraft.server.v1_15_R1.PacketPlayInChat.a(SourceFile:36) ~[craftbukkit-1.15.1-R0.1-SNAPSHOT.jar:git-Bukkit-2d9db47]
	at net.minecraft.server.v1_15_R1.PacketPlayInChat.a(SourceFile:9) ~[craftbukkit-1.15.1-R0.1-SNAPSHOT.jar:git-Bukkit-2d9db47]
	at net.minecraft.server.v1_15_R1.PlayerConnectionUtils.lambda$0(PlayerConnectionUtils.java:19) ~[craftbukkit-1.15.1-R0.1-SNAPSHOT.jar:git-Bukkit-2d9db47]
	at net.minecraft.server.v1_15_R1.TickTask.run(SourceFile:18) [craftbukkit-1.15.1-R0.1-SNAPSHOT.jar:git-Bukkit-2d9db47]
	at net.minecraft.server.v1_15_R1.IAsyncTaskHandler.executeTask(SourceFile:144) [craftbukkit-1.15.1-R0.1-SNAPSHOT.jar:git-Bukkit-2d9db47]
	at net.minecraft.server.v1_15_R1.IAsyncTaskHandlerReentrant.executeTask(SourceFile:23) [craftbukkit-1.15.1-R0.1-SNAPSHOT.jar:git-Bukkit-2d9db47]
	at net.minecraft.server.v1_15_R1.IAsyncTaskHandler.executeNext(SourceFile:118) [craftbukkit-1.15.1-R0.1-SNAPSHOT.jar:git-Bukkit-2d9db47]
	at net.minecraft.server.v1_15_R1.MinecraftServer.aZ(MinecraftServer.java:875) [craftbukkit-1.15.1-R0.1-SNAPSHOT.jar:git-Bukkit-2d9db47]
	at net.minecraft.server.v1_15_R1.MinecraftServer.executeNext(MinecraftServer.java:868) [craftbukkit-1.15.1-R0.1-SNAPSHOT.jar:git-Bukkit-2d9db47]
	at net.minecraft.server.v1_15_R1.IAsyncTaskHandler.awaitTasks(SourceFile:127) [craftbukkit-1.15.1-R0.1-SNAPSHOT.jar:git-Bukkit-2d9db47]
	at net.minecraft.server.v1_15_R1.MinecraftServer.sleepForTick(MinecraftServer.java:852) [craftbukkit-1.15.1-R0.1-SNAPSHOT.jar:git-Bukkit-2d9db47]
	at net.minecraft.server.v1_15_R1.MinecraftServer.run(MinecraftServer.java:792) [craftbukkit-1.15.1-R0.1-SNAPSHOT.jar:git-Bukkit-2d9db47]
	at java.lang.Thread.run(Thread.java:834) [?:?]
Caused by: com.comphenix.protocol.reflect.FieldAccessException: No field with type net.minecraft.server.v1_15_R1.DataWatcher exists in class PacketPlayOutNamedEntitySpawn.
	at com.comphenix.protocol.reflect.StructureModifier.writeInternal(StructureModifier.java:363) ~[?:?]
	at com.comphenix.protocol.reflect.StructureModifier.write(StructureModifier.java:343) ~[?:?]
	at com.bringholm.nametagchanger.ProtocolLibPacketHandler.sendNamedEntitySpawnPacket(ProtocolLibPacketHandler.java:140) ~[?:?]
	at com.bringholm.nametagchanger.NameTagChanger.updatePlayer(NameTagChanger.java:283) ~[?:?]
	at com.bringholm.nametagchanger.NameTagChanger.changePlayerName(NameTagChanger.java:152) ~[?:?]
	at de.simonit.changeidentity.commands.ChangeIdentityCommand.execute(ChangeIdentityCommand.java:53) ~[?:?]
	at org.bukkit.command.SimpleCommandMap.dispatch(SimpleCommandMap.java:148) ~[craftbukkit-1.15.1-R0.1-SNAPSHOT.jar:git-Bukkit-2d9db47]
	... 16 more

@Alvin-LB

[SimonIT]

It seems, that Mojang removed data watchers from the packet in 1.15 dmulloy2/ProtocolLib#738
It would be nice if the plugin would be made compatible with this change

[Alvin-LB]

NameTagChanger needs to be reworked as soon as Mojang changes the packet internals (which happens every few versions). I have not had the time to update this after 1.12.

I can probably fix this, but I cannot say when I will have the time to do so.

[kylematzen]

I'll look into it, but no promises.