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java.lang.NullPointerException: 	at com.gmail.nossr50.mcMMO.onDisable(mcMMO.java:241)	at org.bukkit.plugin.java.JavaPlugin.setEnabled(JavaPlugin.java:323)	at org.bukkit.plugin.java.JavaPluginLoader.disablePlugin(JavaPluginLoader.java:364)	at org.bukkit.plugin.SimplePluginManager.disablePlugin(SimplePluginManager.java:424)	at com.gmail.nossr50.mcMMO.onEnable(mcMMO.java:195)	at org.bukkit.plugin.java.JavaPlugin.setEnabled(JavaPlugin.java:321)	at org.bukkit.plugin.java.JavaPluginLoader.enablePlugin(JavaPluginLoader.java:340)	at org.bukkit.plugin.SimplePluginManager.enablePlugin(SimplePluginManager.java:405)	at org.bukkit.craftbukkit.v1_8_R3.CraftServer.loadPlugin(CraftServer.java:357)	at org.bukkit.craftbukkit.v1_8_R3.CraftServer.enablePlugins(CraftServer.java:317)	at net.minecraft.server.v1_8_R3.DedicatedServer.init(DedicatedServer.java:199)	at net.minecraft.server.v1_8_R3.MinecraftServer.run(MinecraftServer.java:525)	at java.lang.Thread.run(Unknown Source)