19:07:47 [SEVERE] Error occurred while enabling CivCraft v1.8.3 (Is it up to date?)
java.lang.IllegalArgumentException: Empty string not allowed
        at net.minecraft.server.v1_8_R3.NBTTagString.<init>(SourceFile:15)
        at net.minecraft.server.v1_8_R3.NBTTagString.clone(SourceFile:39)
        at net.minecraft.server.v1_8_R3.NBTTagCompound.clone(SourceFile:265)
        at net.minecraft.server.v1_8_R3.NBTTagCompound.clone(SourceFile:265)
        at net.minecraft.server.v1_8_R3.ItemStack.cloneItemStack(ItemStack.java:280)
        at org.bukkit.craftbukkit.v1_8_R3.inventory.CraftItemStack.asNMSCopy(CraftItemStack.java:28)
        at gpl.AttributeUtil.<init>(AttributeUtil.java:232)
        at com.avrgaming.civcraft.lorestorage.LoreMaterial.getMID(LoreMaterial.java:103)
        at com.avrgaming.civcraft.lorestorage.LoreMaterial.getMaterial(LoreMaterial.java:134)
        at com.avrgaming.civcraft.lorestorage.LoreMaterial.isCustom(LoreMaterial.java:123)
        at com.avrgaming.civcraft.lorestorage.LoreCraftableMaterial.getShapelessRecipeKey(LoreCraftableMaterial.java:123)
        at com.avrgaming.civcraft.lorestorage.LoreCraftableMaterial.buildRecipes(LoreCraftableMaterial.java:320)
        at com.avrgaming.civcraft.config.CivSettings.init(CivSettings.java:306)
        at com.avrgaming.civcraft.main.CivCraft.onEnable(CivCraft.java:263)
        at org.bukkit.plugin.java.JavaPlugin.setEnabled(JavaPlugin.java:217)
        at org.bukkit.plugin.java.JavaPluginLoader.enablePlugin(JavaPluginLoader.java:457)
        at org.bukkit.plugin.SimplePluginManager.enablePlugin(SimplePluginManager.java:382)
        at org.bukkit.craftbukkit.v1_8_R3.CraftServer.loadPlugin(CraftServer.java:288)
        at org.bukkit.craftbukkit.v1_8_R3.CraftServer.enablePlugins(CraftServer.java:270)
        at net.minecraft.server.v1_8_R3.MinecraftServer.l(MinecraftServer.java:321)
        at net.minecraft.server.v1_8_R3.MinecraftServer.f(MinecraftServer.java:298)
        at net.minecraft.server.v1_8_R3.MinecraftServer.a(MinecraftServer.java:258)
        at net.minecraft.server.v1_8_R3.DedicatedServer.init(DedicatedServer.java:165)
        at net.minecraft.server.v1_8_R3.MinecraftServer.run(MinecraftServer.java:399)
        at net.minecraft.server.v1_8_R3.ThreadServerApplication.run(SourceFile:583)