[03:10:55] [Server thread/ERROR]: Could not pass event InventoryClickEvent to ProCosmetics v10.0
org.bukkit.event.EventException: null
        at org.bukkit.plugin.java.JavaPluginLoader$1.execute(JavaPluginLoader.java:320) ~[spigot-1.15.1.jar:git-Spigot-037559e-752cf95]
        at org.bukkit.plugin.RegisteredListener.callEvent(RegisteredListener.java:70) ~[spigot-1.15.1.jar:git-Spigot-037559e-752cf95]
        at org.bukkit.plugin.SimplePluginManager.fireEvent(SimplePluginManager.java:529) ~[spigot-1.15.1.jar:git-Spigot-037559e-752cf95]
        at org.bukkit.plugin.SimplePluginManager.callEvent(SimplePluginManager.java:514) ~[spigot-1.15.1.jar:git-Spigot-037559e-752cf95]
        at net.minecraft.server.v1_15_R1.PlayerConnection.a(PlayerConnection.java:2147) ~[spigot-1.15.1.jar:git-Spigot-037559e-752cf95]
        at net.minecraft.server.v1_15_R1.PacketPlayInWindowClick.a(SourceFile:32) ~[spigot-1.15.1.jar:git-Spigot-037559e-752cf95]
        at net.minecraft.server.v1_15_R1.PacketPlayInWindowClick.a(SourceFile:10) ~[spigot-1.15.1.jar:git-Spigot-037559e-752cf95]
        at net.minecraft.server.v1_15_R1.PlayerConnectionUtils.lambda$0(PlayerConnectionUtils.java:19) ~[spigot-1.15.1.jar:git-Spigot-037559e-752cf95]
        at net.minecraft.server.v1_15_R1.TickTask.run(SourceFile:18) [spigot-1.15.1.jar:git-Spigot-037559e-752cf95]
        at net.minecraft.server.v1_15_R1.IAsyncTaskHandler.executeTask(SourceFile:144) [spigot-1.15.1.jar:git-Spigot-037559e-752cf95]
        at net.minecraft.server.v1_15_R1.IAsyncTaskHandlerReentrant.executeTask(SourceFile:23) [spigot-1.15.1.jar:git-Spigot-037559e-752cf95]
        at net.minecraft.server.v1_15_R1.IAsyncTaskHandler.executeNext(SourceFile:118) [spigot-1.15.1.jar:git-Spigot-037559e-752cf95]
        at net.minecraft.server.v1_15_R1.MinecraftServer.aZ(MinecraftServer.java:917) [spigot-1.15.1.jar:git-Spigot-037559e-752cf95]
        at net.minecraft.server.v1_15_R1.MinecraftServer.executeNext(MinecraftServer.java:910) [spigot-1.15.1.jar:git-Spigot-037559e-752cf95]
        at net.minecraft.server.v1_15_R1.IAsyncTaskHandler.awaitTasks(SourceFile:127) [spigot-1.15.1.jar:git-Spigot-037559e-752cf95]
        at net.minecraft.server.v1_15_R1.MinecraftServer.sleepForTick(MinecraftServer.java:894) [spigot-1.15.1.jar:git-Spigot-037559e-752cf95]
        at net.minecraft.server.v1_15_R1.MinecraftServer.run(MinecraftServer.java:827) [spigot-1.15.1.jar:git-Spigot-037559e-752cf95]
        at java.lang.Thread.run(Unknown Source) [?:1.8.0_241]
Caused by: java.lang.NullPointerException
        at org.bukkit.craftbukkit.v1_15_R1.inventory.CraftMetaSkull.equalsCommon(CraftMetaSkull.java:198) ~[spigot-1.15.1.jar:git-Spigot-037559e-752cf95]
        at org.bukkit.craftbukkit.v1_15_R1.inventory.CraftItemFactory.equals(CraftItemFactory.java:307) ~[spigot-1.15.1.jar:git-Spigot-037559e-752cf95]
        at org.bukkit.craftbukkit.v1_15_R1.inventory.CraftItemFactory.equals(CraftItemFactory.java:294) ~[spigot-1.15.1.jar:git-Spigot-037559e-752cf95]
        at org.bukkit.inventory.ItemStack.isSimilar(ItemStack.java:272) ~[spigot-1.15.1.jar:git-Spigot-037559e-752cf95]
        at org.bukkit.craftbukkit.v1_15_R1.inventory.CraftItemStack.isSimilar(CraftItemStack.java:579) ~[spigot-1.15.1.jar:git-Spigot-037559e-752cf95]
        at org.bukkit.inventory.ItemStack.equals(ItemStack.java:253) ~[spigot-1.15.1.jar:git-Spigot-037559e-752cf95]
        at sv.file14.procosmetics.cosmetic.emote.Emote.IiIIiIiIIIIIIIIIiiIiφ(Unknown Source) ~[?:?]
        at sun.reflect.GeneratedMethodAccessor187.invoke(Unknown Source) ~[?:?]
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source) ~[?:1.8.0_241]
        at java.lang.reflect.Method.invoke(Unknown Source) ~[?:1.8.0_241]
        at org.bukkit.plugin.java.JavaPluginLoader$1.execute(JavaPluginLoader.java:316) ~[spigot-1.15.1.jar:git-Spigot-037559e-752cf95]
        ... 17 more