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java.lang.IndexOutOfBoundsException: Index: 0	at java.util.Collections$EmptyList.get(Unknown Source)	at com.gmail.nossr50.util.player.UserManager.getPlayer(UserManager.java:94)	at com.gmail.nossr50.util.player.UserManager.saveAll(UserManager.java:55)	at com.gmail.nossr50.mcMMO.onDisable(mcMMO.java:206)	at org.bukkit.plugin.java.JavaPlugin.setEnabled(JavaPlugin.java:294)	at org.bukkit.plugin.java.JavaPluginLoader.disablePlugin(JavaPluginLoader.java:347)	at org.bukkit.plugin.SimplePluginManager.disablePlugin(SimplePluginManager.java:427)	at org.bukkit.plugin.SimplePluginManager.disablePlugins(SimplePluginManager.java:420)	at org.bukkit.plugin.SimplePluginManager.clearPlugins(SimplePluginManager.java:473)	at org.bukkit.craftbukkit.v1_10_R1.CraftServer.reload(CraftServer.java:742)	at org.bukkit.Bukkit.reload(Bukkit.java:556)	at org.bukkit.command.defaults.ReloadCommand.execute(ReloadCommand.java:43)	at org.bukkit.command.SimpleCommandMap.dispatch(SimpleCommandMap.java:152)	at org.bukkit.craftbukkit.v1_10_R1.CraftServer.dispatchCommand(CraftServer.java:665)	at org.bukkit.craftbukkit.v1_10_R1.CraftServer.dispatchServerCommand(CraftServer.java:628)	at net.minecraft.server.v1_10_R1.DedicatedServer.aL(DedicatedServer.java:442)	at net.minecraft.server.v1_10_R1.DedicatedServer.D(DedicatedServer.java:405)	at net.minecraft.server.v1_10_R1.MinecraftServer.C(MinecraftServer.java:725)	at net.minecraft.server.v1_10_R1.MinecraftServer.run(MinecraftServer.java:624)	at java.lang.Thread.run(Unknown Source)