Skin-Manager Error

Header :
java.io.FileInputStream.open0(Native Method)
java.io.FileInputStream.open(Unknown Source)
java.io.FileInputStream.<init>(Unknown Source)
java.util.Scanner.<init>(Unknown Source)
me.kitt3120.skinmanager.Core.getNewestVersion(Core.java:171)
me.kitt3120.skinmanager.Core.isUpdateAvailable(Core.java:159)
me.kitt3120.skinmanager.Core.onEnable(Core.java:72)
org.bukkit.plugin.java.JavaPlugin.setEnabled(JavaPlugin.java:321)
org.bukkit.plugin.java.JavaPluginLoader.enablePlugin(JavaPluginLoader.java:332)
org.bukkit.plugin.SimplePluginManager.enablePlugin(SimplePluginManager.java:404)
org.bukkit.craftbukkit.v1_8_R3.CraftServer.loadPlugin(CraftServer.java:342)
org.bukkit.craftbukkit.v1_8_R3.CraftServer.enablePlugins(CraftServer.java:314)
net.minecraft.server.v1_8_R3.MinecraftServer.s(MinecraftServer.java:406)
net.minecraft.server.v1_8_R3.MinecraftServer.k(MinecraftServer.java:370)
net.minecraft.server.v1_8_R3.MinecraftServer.a(MinecraftServer.java:325)
net.minecraft.server.v1_8_R3.DedicatedServer.init(DedicatedServer.java:235)
net.minecraft.server.v1_8_R3.MinecraftServer.run(MinecraftServer.java:504)
java.lang.Thread.run(Unknown Source)
Next :

plugins\SkinManager\UpdateInfo.txt (Не удается найти указанный файл)
java.io.FileNotFoundException: plugins\SkinManager\UpdateInfo.txt (Не удается найти указанный файл)