help

[r_vm00]

good morning everyone, I tried to give the op to my player but as soon as I enter the server it makes me exit and gives me the following error, how can I solve it?
[20:50:33] [Server thread/INFO]: Made deniiiixe a server operator
[20:51:13] [Server thread/INFO]: deniiiixe[/101.177.199.57:49152] logged in with entity id 209 at (-234.4932081755962, -45.496205070821695, -18.9481697070753)
[20:51:14] [Server thread/INFO]: deniiiixe joined the game
[20:51:14] [Server thread/ERROR]: Couldn't place player in world
java.util.NoSuchElementException: packet_handler
  at io.netty.channel.DefaultChannelPipeline.getContextOrDie(DefaultChannelPipeline.java:1073) ~[netty-transport-4.1.77.Final.jar:?]
  at io.netty.channel.DefaultChannelPipeline.addAfter(DefaultChannelPipeline.java:302) ~[netty-transport-4.1.77.Final.jar:?]
  at io.netty.channel.DefaultChannelPipeline.addAfter(DefaultChannelPipeline.java:290) ~[netty-transport-4.1.77.Final.jar:?]
  at net.minecraft.class_3324.handler$zij001$minehutplugin$placeNewPlayer(class_3324.java:3508) ~[server-intermediary.jar:?]
  at net.minecraft.class_3324.method_14570(class_3324.java:289) ~[server-intermediary.jar:?]
  at net.minecraft.class_3248.method_33800(class_3248.java:151) ~[server-intermediary.jar:?]
  at net.minecraft.class_3248.method_14384(class_3248.java:138) ~[server-intermediary.jar:?]
  at net.minecraft.class_3248.redirect$zgd000$fabric-networking-api-v1$handlePlayerJoin(class_3248.java:563) ~[server-intermediary.jar:?]
  at net.minecraft.class_3248.method_18784(class_3248.java:73) ~[server-intermediary.jar:?]
  at net.minecraft.class_2535.method_10754(class_2535.java:248) ~[server-intermediary.jar:?]
  at net.minecraft.class_3242.method_14357(class_3242.java:183) ~[server-intermediary.jar:?]
  at net.minecraft.server.MinecraftServer.method_3813(MinecraftServer.java:886) ~[server-intermediary.jar:?]
  at net.minecraft.class_3176.method_3813(class_3176.java:289) ~[server-intermediary.jar:?]
  at net.minecraft.server.MinecraftServer.method_3748(MinecraftServer.java:819) ~[server-intermediary.jar:?]
  at net.minecraft.server.MinecraftServer.method_29741(MinecraftServer.java:665) ~[server-intermediary.jar:?]
  at net.minecraft.server.MinecraftServer.method_29739(MinecraftServer.java:257) ~[server-intermediary.jar:?]
  at java.lang.Thread.run(Thread.java:833) [?:?]
[20:51:14] [Server thread/INFO]: deniiiixe lost connection: Disconnected
[20:51:14] [Server thread/INFO]: deniiiixe left the game
[20:51:14] [Server thread/WARN]: handleDisconnection() called twice