Plugin SafeTrade 1.13

Siemka chciałbym ten plugin zastosować na serwerze 1.16.2 ( lecz wszystko działa ale jak wpisuje /trade nick ) 

To wyświetla się taki błąd w konsoli: 

[11:29:57] [Server thread/WARN]: java.lang.NoSuchMethodException: net.minecraft.server.v1_16_R2.PacketPlayOutChat.(net.minecraft.server.v1_16_R2.IChatBaseComponent)
[11:29:57] [Server thread/WARN]: at java.lang.Class.getConstructor0(Class.java:3082)
[11:29:57] [Server thread/WARN]: at java.lang.Class.getConstructor(Class.java:1825)
[11:29:57] [Server thread/WARN]: at de.oppermann.bastian.safetrade.util.JSONUtil.sendJSONText(JSONUtil.java:78)
[11:29:57] [Server thread/WARN]: at de.oppermann.bastian.safetrade.commands.TradeCommand.onCommand(TradeCommand.java:194)
[11:29:57] [Server thread/WARN]: at org.bukkit.command.PluginCommand.execute(PluginCommand.java:45)
[11:29:57] [Server thread/WARN]: at org.bukkit.command.SimpleCommandMap.dispatch(SimpleCommandMap.java:149)
[11:29:57] [Server thread/WARN]: at org.bukkit.craftbukkit.v1_16_R2.CraftServer.dispatchCommand(CraftServer.java:756)
[11:29:57] [Server thread/WARN]: at net.minecraft.server.v1_16_R2.PlayerConnection.handleCommand(PlayerConnection.java:1697)
[11:29:57] [Server thread/WARN]: at net.minecraft.server.v1_16_R2.PlayerConnection.a(PlayerConnection.java:1540)
[11:29:57] [Server thread/WARN]: at net.minecraft.server.v1_16_R2.PacketPlayInChat.a(PacketPlayInChat.java:47)
[11:29:57] [Server thread/WARN]: at net.minecraft.server.v1_16_R2.PacketPlayInChat.a(PacketPlayInChat.java:1)
[11:29:57] [Server thread/WARN]: at net.minecraft.server.v1_16_R2.PlayerConnectionUtils.lambda$0(PlayerConnectionUtils.java:19)
[11:29:57] [Server thread/WARN]: at net.minecraft.server.v1_16_R2.TickTask.run(SourceFile:18)
[11:29:57] [Server thread/WARN]: at net.minecraft.server.v1_16_R2.IAsyncTaskHandler.executeTask(SourceFile:144)
[11:29:57] [Server thread/WARN]: at net.minecraft.server.v1_16_R2.IAsyncTaskHandlerReentrant.executeTask(SourceFile:23)
[11:29:57] [Server thread/WARN]: at net.minecraft.server.v1_16_R2.IAsyncTaskHandler.executeNext(SourceFile:118)
[11:29:57] [Server thread/WARN]: at net.minecraft.server.v1_16_R2.MinecraftServer.ba(MinecraftServer.java:941)
[11:29:57] [Server thread/WARN]: at net.minecraft.server.v1_16_R2.MinecraftServer.executeNext(MinecraftServer.java:934)
[11:29:57] [Server thread/WARN]: at net.minecraft.server.v1_16_R2.IAsyncTaskHandler.executeAll(SourceFile:103)
[11:29:57] [Server thread/WARN]: at net.minecraft.server.v1_16_R2.MinecraftServer.sleepForTick(MinecraftServer.java:917)
[11:29:57] [Server thread/WARN]: at net.minecraft.server.v1_16_R2.MinecraftServer.w(MinecraftServer.java:850)
[11:29:57] [Server thread/WARN]: at net.minecraft.server.v1_16_R2.MinecraftServer.lambda$0(MinecraftServer.java:164)
[11:29:57] [Server thread/WARN]: at java.lang.Thread.run(Thread.java:745)

Czy coś z tym można zrobić czy można zostawić?