[21:48:29] [Server thread/ERROR]: Could not load 'plugins\CatAntiCheatPlugin.jar' in folder 'plugins'
org.bukkit.plugin.InvalidPluginException: java.lang.IllegalStateException: JavaPlugin requires org.bukkit.plugin.java.PluginClassLoader
        at org.bukkit.plugin.java.JavaPluginLoader.loadPlugin(JavaPluginLoader.java:135) ~[JavaPluginLoader.class:git-CatServer-1.12.2-dae70adc]
        at org.bukkit.plugin.SimplePluginManager.loadPlugin(SimplePluginManager.java:329) ~[SimplePluginManager.class:git-CatServer-1.12.2-dae70adc]
        at org.bukkit.plugin.SimplePluginManager.loadPlugins(SimplePluginManager.java:251) [SimplePluginManager.class:git-CatServer-1.12.2-dae70adc]
        at org.bukkit.craftbukkit.v1_12_R1.CraftServer.loadPlugins(CraftServer.java:359) [CraftServer.class:git-CatServer-1.12.2-dae70adc]
        at net.minecraft.server.MinecraftServer.func_71247_a(MinecraftServer.java:340) [MinecraftServer.class:?]
        at net.minecraft.server.dedicated.DedicatedServer.func_71197_b(DedicatedServer.java:330) [nz.class:?]
        at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:642) [MinecraftServer.class:?]
        at java.lang.Thread.run(Unknown Source) [?:1.8.0_251]
Caused by: java.lang.IllegalStateException: JavaPlugin requires org.bukkit.plugin.java.PluginClassLoader
        at org.bukkit.plugin.java.JavaPlugin.<init>(JavaPlugin.java:58) ~[JavaPlugin.class:git-CatServer-1.12.2-dae70adc]
        at luohuayu.anticheat.plugin.CatAntiCheat.<init>(CatAntiCheat.java:17) ~[CatAntiCheat.class:?]
        at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method) ~[?:1.8.0_251]
        at sun.reflect.NativeConstructorAccessorImpl.newInstance(Unknown Source) ~[?:1.8.0_251]
        at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(Unknown Source) ~[?:1.8.0_251]
        at java.lang.reflect.Constructor.newInstance(Unknown Source) ~[?:1.8.0_251]
        at java.lang.Class.newInstance(Unknown Source) ~[?:1.8.0_251]
        at org.bukkit.plugin.java.PluginClassLoader.<init>(PluginClassLoader.java:98) ~[PluginClassLoader.class:git-CatServer-1.12.2-dae70adc]
        at org.bukkit.plugin.java.JavaPluginLoader.loadPlugin(JavaPluginLoader.java:131) ~[JavaPluginLoader.class:git-CatServer-1.12.2-dae70adc]



我的端很多插件都这个问题 生成不了插件文件 也尝试过转码了  面板服就正常使用 vps就不好使 请教如何解决

无效的插件。

是这么提示的 但是面板里就好使 为啥vps就不好使

尝试更新到最新版CatServer/墨端  服务端

请重装Java，你的Java的ClassLoader好像有点问题，org.bukkit.plugin.java.PluginClassLoader 没正常工作。

确实是服务器端的问题 墨端就可以 但是catserver就不行 不知道怎么解决

去下载一个最新版本的cat试试咯，不行的话就用墨端吧