UltimateModeration View Inventory

[20:51:40] [Server thread/INFO]: Hipopotofobia issued server command: /um
[20:51:52] [Server thread/ERROR]: Could not pass event InventoryClickEvent to UltimateModeration v1
org.bukkit.event.EventException: null
        at org.bukkit.plugin.java.JavaPluginLoader$1.execute(JavaPluginLoader.java:315) ~[spigot-1.14-pre5-2.jar:git-Spigot-dc58fe4-331c439]
        at org.bukkit.plugin.RegisteredListener.callEvent(RegisteredListener.java:70) ~[spigot-1.14-pre5-2.jar:git-Spigot-dc58fe4-331c439]
        at org.bukkit.plugin.SimplePluginManager.fireEvent(SimplePluginManager.java:508) ~[spigot-1.14-pre5-2.jar:git-Spigot-dc58fe4-331c439]
        at org.bukkit.plugin.SimplePluginManager.callEvent(SimplePluginManager.java:493) ~[spigot-1.14-pre5-2.jar:git-Spigot-dc58fe4-331c439]
        at net.minecraft.server.v1_14_R1.PlayerConnection.a(PlayerConnection.java:2159) ~[spigot-1.14-pre5-2.jar:git-Spigot-dc58fe4-331c439]
        at net.minecraft.server.v1_14_R1.PacketPlayInWindowClick.a(SourceFile:33) ~[spigot-1.14-pre5-2.jar:git-Spigot-dc58fe4-331c439]
        at net.minecraft.server.v1_14_R1.PacketPlayInWindowClick.a(SourceFile:10) ~[spigot-1.14-pre5-2.jar:git-Spigot-dc58fe4-331c439]
        at net.minecraft.server.v1_14_R1.PlayerConnectionUtils.lambda$0(PlayerConnectionUtils.java:13) ~[spigot-1.14-pre5-2.jar:git-Spigot-dc58fe4-331c439]
        at net.minecraft.server.v1_14_R1.TickTask.run(SourceFile:18) [spigot-1.14-pre5-2.jar:git-Spigot-dc58fe4-331c439]
        at net.minecraft.server.v1_14_R1.IAsyncTaskHandler.h(SourceFile:135) [spigot-1.14-pre5-2.jar:git-Spigot-dc58fe4-331c439]
        at net.minecraft.server.v1_14_R1.IAsyncTaskHandlerReentrant.h(SourceFile:23) [spigot-1.14-pre5-2.jar:git-Spigot-dc58fe4-331c439]
        at net.minecraft.server.v1_14_R1.IAsyncTaskHandler.p(SourceFile:114) [spigot-1.14-pre5-2.jar:git-Spigot-dc58fe4-331c439]
        at net.minecraft.server.v1_14_R1.MinecraftServer.aW(MinecraftServer.java:876) [spigot-1.14-pre5-2.jar:git-Spigot-dc58fe4-331c439]
        at net.minecraft.server.v1_14_R1.MinecraftServer.p(MinecraftServer.java:869) [spigot-1.14-pre5-2.jar:git-Spigot-dc58fe4-331c439]
        at net.minecraft.server.v1_14_R1.IAsyncTaskHandler.c(SourceFile:123) [spigot-1.14-pre5-2.jar:git-Spigot-dc58fe4-331c439]
        at net.minecraft.server.v1_14_R1.MinecraftServer.sleepForTick(MinecraftServer.java:853) [spigot-1.14-pre5-2.jar:git-Spigot-dc58fe4-331c439]
        at net.minecraft.server.v1_14_R1.MinecraftServer.run(MinecraftServer.java:793) [spigot-1.14-pre5-2.jar:git-Spigot-dc58fe4-331c439]
        at java.lang.Thread.run(Unknown Source) [?:1.8.0_211]
Caused by: java.lang.IllegalArgumentException: Unsupported custom size 41
        at org.bukkit.craftbukkit.v1_14_R1.entity.CraftHumanEntity.openInventory(CraftHumanEntity.java:334) ~[spigot-1.14-pre5-2.jar:git-Spigot-dc58fe4-331c439]
        at com.songoda.ultimatemoderation.gui.GUIModerate.lambda$registerClickables$3(GUIModerate.java:58) ~[?:?]
        at com.songoda.ultimatemoderation.utils.gui.AbstractGUI$1.onClickGUI(AbstractGUI.java:87) ~[?:?]
        at sun.reflect.GeneratedMethodAccessor39.invoke(Unknown Source) ~[?:?]
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source) ~[?:1.8.0_211]
        at java.lang.reflect.Method.invoke(Unknown Source) ~[?:1.8.0_211]
        at org.bukkit.plugin.java.JavaPluginLoader$1.execute(JavaPluginLoader.java:311) ~[spigot-1.14-pre5-2.jar:git-Spigot-dc58fe4-331c439]
        ... 17 more