[18:46:42 INFO]: [EnchantmentSolution] Checking uuid - bf0da57c-863d-425f-beda-52fffdbce707
[18:46:42 WARN]: java.lang.NullPointerException
[18:46:42 WARN]:        at org.ctp.enchantmentsolution.utils.items.ItemUtils.containsAttribute(ItemUtils.java:173)
[18:46:42 WARN]:        at org.ctp.enchantmentsolution.utils.items.ItemUtils.combineItems(ItemUtils.java:138)
[18:46:42 WARN]:        at org.ctp.enchantmentsolution.inventory.Anvil.setInventory(Anvil.java:205)
[18:46:42 WARN]:        at org.ctp.enchantmentsolution.inventory.Anvil.setInventory(Anvil.java:46)
[18:46:42 WARN]:        at org.ctp.enchantmentsolution.utils.InventoryClickUtils.setAnvilDetails(InventoryClickUtils.java:84)
[18:46:42 WARN]:        at org.ctp.enchantmentsolution.listeners.InventoryClick.onInventoryClick(InventoryClick.java:44)
[18:46:42 WARN]:        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
[18:46:42 WARN]:        at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
[18:46:42 WARN]:        at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
[18:46:42 WARN]:        at java.lang.reflect.Method.invoke(Unknown Source)
[18:46:42 WARN]:        at org.bukkit.plugin.java.JavaPluginLoader$1.execute(JavaPluginLoader.java:312)
[18:46:42 WARN]:        at org.bukkit.plugin.RegisteredListener.callEvent(RegisteredListener.java:66)
[18:46:42 WARN]:        at org.bukkit.plugin.SimplePluginManager.fireEvent(SimplePluginManager.java:507)
[18:46:42 WARN]:        at org.bukkit.plugin.SimplePluginManager.callEvent(SimplePluginManager.java:492)
[18:46:42 WARN]:        at net.minecraft.server.v1_13_R2.PlayerConnection.a(PlayerConnection.java:2107)
[18:46:42 WARN]:        at net.minecraft.server.v1_13_R2.PacketPlayInWindowClick.a(SourceFile:33)
[18:46:42 WARN]:        at net.minecraft.server.v1_13_R2.PacketPlayInWindowClick.a(SourceFile:10)
[18:46:42 WARN]:        at net.minecraft.server.v1_13_R2.PlayerConnectionUtils.lambda$0(PlayerConnectionUtils.java:9)
[18:46:42 WARN]:        at java.util.concurrent.Executors$RunnableAdapter.call(Unknown Source)
[18:46:42 WARN]:        at java.util.concurrent.FutureTask.run(Unknown Source)
[18:46:42 WARN]:        at net.minecraft.server.v1_13_R2.SystemUtils.a(SourceFile:199)
[18:46:42 WARN]:        at net.minecraft.server.v1_13_R2.MinecraftServer.b(MinecraftServer.java:896)
[18:46:42 WARN]:        at net.minecraft.server.v1_13_R2.DedicatedServer.b(DedicatedServer.java:417)
[18:46:42 WARN]:        at net.minecraft.server.v1_13_R2.MinecraftServer.a(MinecraftServer.java:831)
[18:46:42 WARN]:        at net.minecraft.server.v1_13_R2.MinecraftServer.run(MinecraftServer.java:729)
[18:46:42 WARN]:        at java.lang.Thread.run(Unknown Source)