[12:54:42 ERROR]: Error occurred while disabling ProPractice v6.5 (Is it up to date?)
java.lang.NoClassDefFoundError: com/sk89q/worldedit/world/World
        at .???????????????????????.................................................................................................................???IiIIIiiIiiiIIiIIIiIiIIiIi??.iIIIiIIIiiiiiIIIiIIiIiIiiIIiIiiIiiiIIIiI?.d(Unknown Source) ~[ProPractice.jar:?]
        at sv.file14.propractice.Core.onDisable(Unknown Source) ~[ProPractice.jar:?]
        at org.bukkit.plugin.java.JavaPlugin.setEnabled(JavaPlugin.java:323) ~[Practice.jar:git-Spigot-21fe707-e1ebe52]
        at org.bukkit.plugin.java.JavaPluginLoader.disablePlugin(JavaPluginLoader.java:364) [Practice.jar:git-Spigot-21fe707-e1ebe52]
        at org.bukkit.plugin.SimplePluginManager.disablePlugin(SimplePluginManager.java:424) [Practice.jar:git-Spigot-21fe707-e1ebe52]
        at org.bukkit.plugin.SimplePluginManager.disablePlugins(SimplePluginManager.java:417) [Practice.jar:git-Spigot-21fe707-e1ebe52]
        at org.bukkit.craftbukkit.v1_8_R3.CraftServer.disablePlugins(CraftServer.java:336) [Practice.jar:git-Spigot-21fe707-e1ebe52]
        at net.minecraft.server.v1_8_R3.MinecraftServer.stop(MinecraftServer.java:460) [Practice.jar:git-Spigot-21fe707-e1ebe52]
        at net.minecraft.server.v1_8_R3.MinecraftServer.run(MinecraftServer.java:593) [Practice.jar:git-Spigot-21fe707-e1ebe52]
        at java.lang.Thread.run(Thread.java:748) [?:1.8.0_151]
Caused by: java.lang.ClassNotFoundException: com.sk89q.worldedit.world.World
        at java.net.URLClassLoader.findClass(URLClassLoader.java:381) ~[?:1.8.0_151]
        at org.bukkit.plugin.java.PluginClassLoader.findClass(PluginClassLoader.java:101) ~[Practice.jar:git-Spigot-21fe707-e1ebe52]
        at org.bukkit.plugin.java.PluginClassLoader.findClass(PluginClassLoader.java:86) ~[Practice.jar:git-Spigot-21fe707-e1ebe52]
        at java.lang.ClassLoader.loadClass(ClassLoader.java:424) ~[?:1.8.0_151]
        at java.lang.ClassLoader.loadClass(ClassLoader.java:357) ~[?:1.8.0_151]
        ... 10 more