New Error

java.lang.NoSuchMethodException: net.minecraft.server.v1_16_R1.PacketPlayOutChat.<init>(net.minecraft.server.v1_16_R1.IChatBaseComponent)
at java.lang.Class.getConstructor0(Unknown Source)
at java.lang.Class.getConstructor(Unknown Source)
at com.PCPSells.plotmines.JsonMessage.send(JsonMessage.java:37)
at com.PCPSells.plotmines.Commands.onCommand(Commands.java:199)
at org.bukkit.command.PluginCommand.execute(PluginCommand.java:45)
at com.earth2me.essentials.Essentials.onCommandEssentials(Essentials.java:536)
at com.earth2me.essentials.Essentials.onCommand(Essentials.java:525)
at org.bukkit.command.PluginCommand.execute(PluginCommand.java:45)
at org.bukkit.command.SimpleCommandMap.dispatch(SimpleCommandMap.java:159)
at org.bukkit.craftbukkit.v1_16_R1.CraftServer.dispatchCommand(CraftServer.java:794)
at net.minecraft.server.v1_16_R1.PlayerConnection.handleCommand(PlayerConnection.java:1910)
at net.minecraft.server.v1_16_R1.PlayerConnection.a(PlayerConnection.java:1721)
at net.minecraft.server.v1_16_R1.PacketPlayInChat.a(PacketPlayInChat.java:47)
at net.minecraft.server.v1_16_R1.PacketPlayInChat.a(PacketPlayInChat.java:5)
at net.minecraft.server.v1_16_R1.PlayerConnectionUtils.lambda$ensureMainThread$1(PlayerConnectionUtils.java:23)
at net.minecraft.server.v1_16_R1.TickTask.run(SourceFile:18)
at net.minecraft.server.v1_16_R1.IAsyncTaskHandler.executeTask(IAsyncTaskHandler.java:136)
at net.minecraft.server.v1_16_R1.IAsyncTaskHandlerReentrant.executeTask(SourceFile:23)
at net.minecraft.server.v1_16_R1.IAsyncTaskHandler.executeNext(IAsyncTaskHandler.java:109)
at net.minecraft.server.v1_16_R1.MinecraftServer.aZ(MinecraftServer.java:1137)
at net.minecraft.server.v1_16_R1.MinecraftServer.executeNext(MinecraftServer.java:1130)
at net.minecraft.server.v1_16_R1.IAsyncTaskHandler.awaitTasks(IAsyncTaskHandler.java:119)
at net.minecraft.server.v1_16_R1.MinecraftServer.sleepForTick(MinecraftServer.java:1091)
at net.minecraft.server.v1_16_R1.MinecraftServer.v(MinecraftServer.java:1005)
at net.minecraft.server.v1_16_R1.MinecraftServer.lambda$a$0(MinecraftServer.java:177)
at java.lang.Thread.run(Unknown Source)