Error Installing

[FunkyNico]

I Have this error trying to install the plugin:

Error enabling plugin BungeeAuth java.lang.NoClassDefFoundError: org/bukkit/event/Listener at java.lang.ClassLoader.defineClass1(Native Method) at java.lang.ClassLoader.defineClass(Unknown Source) at java.security.SecureClassLoader.defineClass(Unknown Source) at java.net.URLClassLoader.defineClass(Unknown Source) at java.net.URLClassLoader.access$100(Unknown Source) at java.net.URLClassLoader$1.run(Unknown Source) at java.net.URLClassLoader$1.run(Unknown Source) at java.security.AccessController.doPrivileged(Native Method) at java.net.URLClassLoader.findClass(Unknown Source) at java.lang.ClassLoader.loadClass(Unknown Source) at net.md_5.bungee.api.plugin.PluginClassloader.loadClass0(PluginClassloader.java:34) at net.md_5.bungee.api.plugin.PluginClassloader.loadClass(PluginClassloader.java:27) at java.lang.ClassLoader.loadClass(Unknown Source) at net.md_5.bungee.api.plugin.PluginManager.enablePlugin(PluginManager.java:304) at net.md_5.bungee.api.plugin.PluginManager.loadPlugins(PluginManager.java:212) at net.md_5.bungee.BungeeCord.start(BungeeCord.java:257) at net.md_5.bungee.BungeeCordLauncher.main(BungeeCordLauncher.java:56) at net.md_5.bungee.Bootstrap.main(Bootstrap.java:15) Caused by: java.lang.ClassNotFoundException: org.bukkit.event.Listener at net.md_5.bungee.api.plugin.PluginClassloader.loadClass0(PluginClassloader.java:53) at net.md_5.bungee.api.plugin.PluginClassloader.loadClass(PluginClassloader.java:27) at java.lang.ClassLoader.loadClass(Unknown Source) ... 18 more