Minecraft 1.19 spigot server console spam

When I join my server my server console spams error or java smth

console: [14:34:45] [Netty Server IO #2/WARN]: at io.netty.util.internal.ThreadExecutorMap$2.run(ThreadExecutorMap.java:74)
[14:34:45] [Netty Server IO #2/WARN]: at java.base/java.lang.Thread.run(Thread.java:833)
[14:34:45] [Netty Server IO #2/WARN]: java.lang.ClassNotFoundException: net.minecraft.network.protocol.game.PacketPlayOutChat
[14:34:45] [Netty Server IO #2/WARN]: at org.bukkit.plugin.java.PluginClassLoader.loadClass0(PluginClassLoader.java:147)
[14:34:45] [Netty Server IO #2/WARN]: at org.bukkit.plugin.java.PluginClassLoader.loadClass(PluginClassLoader.java:99)
[14:34:45] [Netty Server IO #2/WARN]: at java.base/java.lang.ClassLoader.loadClass(ClassLoader.java:521)
[14:34:45] [Netty Server IO #2/WARN]: at java.base/java.lang.Class.forName0(Native Method)
[14:34:45] [Netty Server IO #2/WARN]: at java.base/java.lang.Class.forName(Class.java:383)
[14:34:45] [Netty Server IO #2/WARN]: at java.base/java.lang.Class.forName(Class.java:376)
[14:34:45] [Netty Server IO #2/WARN]: at de.rapha149.messagehider.util.ReflectionUtil.getClass(ReflectionUtil.java:60)
[14:34:45] [Netty Server IO #2/WARN]: at de.rapha149.messagehider.Events$1.write(Events.java:66)
[14:34:45] [Netty Server IO #2/WARN]: at io.netty.channel.AbstractChannelHandlerContext.invokeWrite0(AbstractChannelHandlerContext.java:717)
[14:34:45] [Netty Server IO #2/WARN]: at io.netty.channel.AbstractChannelHandlerContext.invokeWriteAndFlush(AbstractChannelHandlerContext.java:764)
[14:34:45] [Netty Server IO #2/WARN]: at io.netty.channel.AbstractChannelHandlerContext.write(AbstractChannelHandlerContext.java:790)
[14:34:45] [Netty Server IO #2/WARN]: at io.netty.channel.AbstractChannelHandlerContext.writeAndFlush(AbstractChannelHandlerContext.java:758)
[14:34:45] [Netty Server IO #2/WARN]: at io.netty.channel.DefaultChannelPipeline.writeAndFlush(DefaultChannelPipeline.java:1020)
[14:34:45] [Netty Server IO #2/WARN]: at io.netty.channel.AbstractChannel.writeAndFlush(AbstractChannel.java:311)
[14:34:45] [Netty Server IO #2/WARN]: at com.comphenix.protocol.injector.netty.channel.NettyChannelProxy.writeAndFlush(NettyChannelProxy.java:227)
[14:34:45] [Netty Server IO #2/WARN]: at com.comphenix.protocol.injector.netty.channel.NettyChannelProxy.writeAndFlush(NettyChannelProxy.java:233)

does anyone know what this problem is?