java.lang.NoClassDefFoundError: com/sk89q/minecraft/util/commands/CommandException
        at java.lang.Class.forName0(Native Method)
        at java.lang.Class.forName(Class.java:247)
        at org.bukkit.plugin.java.JavaPluginLoader.loadPlugin(JavaPluginLoader.java:168)
        at org.bukkit.plugin.SimplePluginManager.loadPlugin(SimplePluginManager.java:213)
        at org.bukkit.plugin.SimplePluginManager.loadPlugins(SimplePluginManager.java:136)
        at org.bukkit.craftbukkit.CraftServer.loadPlugins(CraftServer.java:136)
        at org.bukkit.craftbukkit.CraftServer.reload(CraftServer.java:402)
        at org.bukkit.Bukkit.reload(Bukkit.java:173)
        at org.bukkit.command.defaults.ReloadCommand.execute(ReloadCommand.java:22)
        at org.bukkit.command.SimpleCommandMap.dispatch(SimpleCommandMap.java:163)
        at org.bukkit.craftbukkit.CraftServer.dispatchCommand(CraftServer.java:347)
        at org.bukkit.craftbukkit.CraftServer.dispatchCommand(CraftServer.java:343)
        at net.minecraft.server.MinecraftServer.b(MinecraftServer.java:499)
        at net.minecraft.server.MinecraftServer.h(MinecraftServer.java:478)
        at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:374)
        at net.minecraft.server.ThreadServerApplication.run(SourceFile:417)
Caused by: java.lang.ClassNotFoundException: com.sk89q.minecraft.util.commands.CommandException
        at java.net.URLClassLoader$1.run(URLClassLoader.java:202)
        at java.security.AccessController.doPrivileged(Native Method)
        at java.net.URLClassLoader.findClass(URLClassLoader.java:190)
        at org.bukkit.plugin.java.PluginClassLoader.findClass(PluginClassLoader.java:36)
        at org.bukkit.plugin.java.PluginClassLoader.findClass(PluginClassLoader.java:24)
        at java.lang.ClassLoader.loadClass(ClassLoader.java:306)
        at java.lang.ClassLoader.loadClass(ClassLoader.java:247)
        ... 16 more
16:05:50 [INFO] CommandHelper 181-a8e03de enabled
16:05:50 [INFO] CommandHelper: Using the Bukkit Permissions API.
16:05:50 [INFO] [CommandHelper]: 14 alias(es) defined.
16:05:50 [INFO] WorldEdit 260-9371202 enabled.
16:05:50 [INFO] WorldEdit: Using the Bukkit Permissions API.
16:05:50 [INFO] WorldBorder version 1.4.2 loading