Connectivity Problem with Minecraft - could not connect to server

System Information

Field Value
Operating System Linux - Debian GNU/Linux 12 on x86_64
Product AMP ‘Callisto’ v2.5.1.8 (Mainline)
Virtualization Docker
Application Minecraft
Module MinecraftModule
Running in Container Yes
Current State Stopped

Problem Description

Issue

I could not connect to the server in game neither me or my friends while the panel says that it’s running.

Reproduction Steps

  • stopped server
  • Added znpcs plugin
  • started server

the problem is caused by znpcs and znpcsplus plugins that i installed using the panel. I couldn’t find their files also i can’t uninstall the plugins using the panel.

! [Wed 16:18:00 WARN  io.netty.channel.DefaultChannelPipeline] An exceptionCaught() event was fired, and it reached at the tail of the pipeline. It usually means the last handler in the pipeline did not handle the exception.
java.lang.IllegalStateException: zip file closed
    at java.base/java.util.zip.ZipFile.ensureOpen(ZipFile.java:846)
    at java.base/java.util.zip.ZipFile.getEntry(ZipFile.java:338)
    at java.base/java.util.jar.JarFile.getEntry(JarFile.java:516)
    at java.base/java.util.jar.JarFile.getJarEntry(JarFile.java:471)
    at org.bukkit.plugin.java.PluginClassLoader.findClass(PluginClassLoader.java:172)
    at java.base/java.lang.ClassLoader.loadClass(ClassLoader.java:593)
    at org.bukkit.plugin.java.PluginClassLoader.loadClass0(PluginClassLoader.java:117)
    at org.bukkit.plugin.java.PluginClassLoader.loadClass(PluginClassLoader.java:112)
    at java.base/java.lang.ClassLoader.loadClass(ClassLoader.java:526)
    at lol.pyr.znpcsplus.lib.packetevents.impl.injector.connection.ServerChannelHandler.channelRead(ServerChannelHandler.java:64)
    at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:444)
    at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:420)
    at io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:412)
    at io.netty.channel.DefaultChannelPipeline$HeadContext.channelRead(DefaultChannelPipeline.java:1410)
    at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:440)
    at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:420)
    at io.netty.channel.DefaultChannelPipeline.fireChannelRead(DefaultChannelPipeline.java:919)
    at io.netty.channel.epoll.AbstractEpollServerChannel$EpollServerSocketUnsafe.epollInReady(AbstractEpollServerChannel.java:120)
    at io.netty.channel.epoll.EpollEventLoop.processReady(EpollEventLoop.ja
 
! [Wed 16:18:01 WARN  io.netty.channel.DefaultChannelPipeline] An exceptionCaught() event was fired, and it reached at the tail of the pipeline. It usually means the last handler in the pipeline did not handle the exception.
java.lang.IllegalStateException: zip file closed
    at java.base/java.util.zip.ZipFile.ensureOpen(ZipFile.java:846)
    at java.base/java.util.zip.ZipFile.getEntry(ZipFile.java:338)
    at java.base/java.util.jar.JarFile.getEntry(JarFile.java:516)
    at java.base/java.util.jar.JarFile.getJarEntry(JarFile.java:471)
    at org.bukkit.plugin.java.PluginClassLoader.findClass(PluginClassLoader.java:172)
    at java.base/java.lang.ClassLoader.loadClass(ClassLoader.java:593)
    at org.bukkit.plugin.java.PluginClassLoader.loadClass0(PluginClassLoader.java:117)
    at org.bukkit.plugin.java.PluginClassLoader.loadClass(PluginClassLoader.java:112)
    at java.base/java.lang.ClassLoader.loadClass(ClassLoader.java:526)
    at lol.pyr.znpcsplus.lib.packetevents.impl.injector.connection.ServerChannelHandler.channelRead(ServerChannelHandler.java:64)
    at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:444)
    at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:420)
    at io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:412)
    at io.netty.channel.DefaultChannelPipeline$HeadContext.channelRead(DefaultChannelPipeline.java:1410)
    at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:440)
    at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:420)
    at io.netty.channel.DefaultChannelPipeline.fireChannelRead(DefaultChannelPipeline.java:919)
    at io.netty.channel.epoll.AbstractEpollServerChannel$EpollServerSocketUnsafe.epollInReady(AbstractEpollServerChannel.java:120)
    at io.netty.channel.epoll.AbstractEpollChannel$AbstractEpollUnsafe$1.ru```

The plugin files are just in the plugins directory in the file manager