> [21:05:22 ERROR]: Could not pass event InventoryClickEvent to FabledSkyBlock vBuild-77
org.bukkit.event.EventException: null
at org.bukkit.plugin.java.JavaPluginLoader$1.execute(JavaPluginLoader.java:316) ~[server.jar:git-Spigot-1a3504a-84f3da3]
at org.bukkit.plugin.RegisteredListener.callEvent(RegisteredListener.java:66) ~[server.jar:git-Spigot-1a3504a-84f3da3]
at org.bukkit.plugin.SimplePluginManager.fireEvent(SimplePluginManager.java:507) ~[server.jar:git-Spigot-1a3504a-84f3da3]
at org.bukkit.plugin.SimplePluginManager.callEvent(SimplePluginManager.java:492) ~[server.jar:git-Spigot-1a3504a-84f3da3]
at net.minecraft.server.v1_13_R2.PlayerConnection.a(PlayerConnection.java:2108) ~[server.jar:git-Spigot-1a3504a-84f3da3]
at net.minecraft.server.v1_13_R2.PacketPlayInWindowClick.a(SourceFile:33) ~[server.jar:git-Spigot-1a3504a-84f3da3]
at net.minecraft.server.v1_13_R2.PacketPlayInWindowClick.a(SourceFile:10) ~[server.jar:git-Spigot-1a3504a-84f3da3]
at net.minecraft.server.v1_13_R2.PlayerConnectionUtils.lambda$0(PlayerConnectionUtils.java:9) ~[server.jar:git-Spigot-1a3504a-84f3da3]
at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511) [?:1.8.0_212]
at java.util.concurrent.FutureTask.run(FutureTask.java:266) [?:1.8.0_212]
at net.minecraft.server.v1_13_R2.SystemUtils.a(SourceFile:199) [server.jar:git-Spigot-1a3504a-84f3da3]
at net.minecraft.server.v1_13_R2.MinecraftServer.b(MinecraftServer.java:896) [server.jar:git-Spigot-1a3504a-84f3da3]
at net.minecraft.server.v1_13_R2.DedicatedServer.b(DedicatedServer.java:417) [server.jar:git-Spigot-1a3504a-84f3da3]
at net.minecraft.server.v1_13_R2.MinecraftServer.a(MinecraftServer.java:831) [server.jar:git-Spigot-1a3504a-84f3da3]
at net.minecraft.server.v1_13_R2.MinecraftServer.run(MinecraftServer.java:729) [server.jar:git-Spigot-1a3504a-84f3da3]
at java.lang.Thread.run(Thread.java:748) [?:1.8.0_212]
Caused by: java.lang.NullPointerException
at me.goodandevil.skyblock.stackable.StackableManager.getStack(StackableManager.java:87) ~[?:?]
at me.goodandevil.skyblock.dalton.events.PlayerDeposit.onInvClick(PlayerDeposit.java:107) ~[?:?]
at sun.reflect.GeneratedMethodAccessor281.invoke(Unknown Source) ~[?:?]
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[?:1.8.0_212]
at java.lang.reflect.Method.invoke(Method.java:498) ~[?:1.8.0_212]
at org.bukkit.plugin.java.JavaPluginLoader$1.execute(JavaPluginLoader.java:312) ~[server.jar:git-Spigot-1a3504a-84f3da3]
... 15 more