[14:59:44 INFO]: CrazyWorldPL issued server command: /report CrazyWorldPL test
[14:59:46 INFO]: CrazyWorldPL
[14:59:51 INFO]: CrazyWorldPL issued server command: /reportslist
[14:59:54 ERROR]: Could not pass event InventoryClickEvent to AdvancedReporter v4.2
org.bukkit.command.CommandException: Unhandled exception executing command 'managergui' in plugin AdvancedReporter v4.2
        at org.bukkit.command.PluginCommand.execute(PluginCommand.java:48) ~[patched_1.13.2.jar:git-Paper-641]
        at org.bukkit.command.SimpleCommandMap.dispatch(SimpleCommandMap.java:151) ~[patched_1.13.2.jar:git-Paper-641]
        at org.bukkit.craftbukkit.v1_13_R2.CraftServer.dispatchCommand(CraftServer.java:734) ~[patched_1.13.2.jar:git-Paper-641]
        at org.bukkit.craftbukkit.v1_13_R2.entity.CraftPlayer.performCommand(CraftPlayer.java:448) ~[patched_1.13.2.jar:git-Paper-641]
        at it.alchecraft.nexgan.advancedreporter.events.InventoryClick.onInventoryClick(InventoryClick.java:243) ~[?:?]
        at com.destroystokyo.paper.event.executor.asm.generated.GeneratedEventExecutor27.execute(Unknown Source) ~[?:?]
        at org.bukkit.plugin.EventExecutor.lambda$create$1(EventExecutor.java:69) ~[patched_1.13.2.jar:git-Paper-641]
        at co.aikar.timings.TimedEventExecutor.execute(TimedEventExecutor.java:80) ~[patched_1.13.2.jar:git-Paper-641]
        at org.bukkit.plugin.RegisteredListener.callEvent(RegisteredListener.java:66) ~[patched_1.13.2.jar:git-Paper-641]
        at org.bukkit.plugin.SimplePluginManager.callEvent(SimplePluginManager.java:520) ~[patched_1.13.2.jar:git-Paper-641]
        at net.minecraft.server.v1_13_R2.PlayerConnection.a(PlayerConnection.java:2288) ~[patched_1.13.2.jar:git-Paper-641]
        at net.minecraft.server.v1_13_R2.PacketPlayInWindowClick.a(SourceFile:33) ~[patched_1.13.2.jar:git-Paper-641]
        at net.minecraft.server.v1_13_R2.PacketPlayInWindowClick.a(SourceFile:10) ~[patched_1.13.2.jar:git-Paper-641]
        at net.minecraft.server.v1_13_R2.PlayerConnectionUtils.lambda$ensureMainThread$0(PlayerConnectionUtils.java:15) ~[patched_1.13.2.jar:git-Paper-641]
        at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511) ~[?:1.8.0_222]
        at java.util.concurrent.FutureTask.run(FutureTask.java:266) ~[?:1.8.0_222]
        at net.minecraft.server.v1_13_R2.SystemUtils.a(SystemUtils.java:108) ~[patched_1.13.2.jar:git-Paper-641]
        at net.minecraft.server.v1_13_R2.MinecraftServer.b(MinecraftServer.java:1018) ~[patched_1.13.2.jar:git-Paper-641]
        at net.minecraft.server.v1_13_R2.DedicatedServer.b(DedicatedServer.java:439) ~[patched_1.13.2.jar:git-Paper-641]
        at net.minecraft.server.v1_13_R2.MinecraftServer.a(MinecraftServer.java:940) ~[patched_1.13.2.jar:git-Paper-641]
        at net.minecraft.server.v1_13_R2.MinecraftServer.run(MinecraftServer.java:837) ~[patched_1.13.2.jar:git-Paper-641]
        at java.lang.Thread.run(Thread.java:748) [?:1.8.0_222]
Caused by: java.lang.IllegalArgumentException: Material cannot be null
        at org.apache.commons.lang.Validate.notNull(Validate.java:192) ~[patched_1.13.2.jar:git-Paper-641]
        at org.bukkit.inventory.ItemStack.<init>(ItemStack.java:74) ~[patched_1.13.2.jar:git-Paper-641]
        at org.bukkit.inventory.ItemStack.<init>(ItemStack.java:62) ~[patched_1.13.2.jar:git-Paper-641]
        at org.bukkit.inventory.ItemStack.<init>(ItemStack.java:50) ~[patched_1.13.2.jar:git-Paper-641]
        at it.alchecraft.nexgan.advancedreporter.commands.ManagerGUI.onCommand(ManagerGUI.java:79) ~[?:?]
        at org.bukkit.command.PluginCommand.execute(PluginCommand.java:46) ~[patched_1.13.2.jar:git-Paper-641]
        ... 21 more