[14:42:15] [Server thread/ERROR]: Could not pass event PlayerDropItemEvent to HyperConomy v0.975.6
org.bukkit.event.EventException
	at org.bukkit.plugin.java.JavaPluginLoader$1.execute(JavaPluginLoader.java:310) ~[spigot49.jar:git-Spigot-f04e043-52c7fc0]
	at org.bukkit.plugin.RegisteredListener.callEvent(RegisteredListener.java:62) ~[spigot49.jar:git-Spigot-f04e043-52c7fc0]
	at org.bukkit.plugin.SimplePluginManager.fireEvent(SimplePluginManager.java:502) [spigot49.jar:git-Spigot-f04e043-52c7fc0]
	at org.bukkit.plugin.SimplePluginManager.callEvent(SimplePluginManager.java:487) [spigot49.jar:git-Spigot-f04e043-52c7fc0]
	at net.minecraft.server.v1_9_R1.EntityHuman.a(EntityHuman.java:556) [spigot49.jar:git-Spigot-f04e043-52c7fc0]
	at net.minecraft.server.v1_9_R1.EntityHuman.drop(EntityHuman.java:513) [spigot49.jar:git-Spigot-f04e043-52c7fc0]
	at net.minecraft.server.v1_9_R1.Container.a(Container.java:229) [spigot49.jar:git-Spigot-f04e043-52c7fc0]
	at net.minecraft.server.v1_9_R1.PlayerConnection.a(PlayerConnection.java:1857) [spigot49.jar:git-Spigot-f04e043-52c7fc0]
	at net.minecraft.server.v1_9_R1.PacketPlayInWindowClick.a(SourceFile:33) [spigot49.jar:git-Spigot-f04e043-52c7fc0]
	at net.minecraft.server.v1_9_R1.PacketPlayInWindowClick.a(SourceFile:10) [spigot49.jar:git-Spigot-f04e043-52c7fc0]
	at net.minecraft.server.v1_9_R1.PlayerConnectionUtils$1.run(SourceFile:13) [spigot49.jar:git-Spigot-f04e043-52c7fc0]
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:471) [?:1.7.0_80]
	at java.util.concurrent.FutureTask.run(FutureTask.java:262) [?:1.7.0_80]
	at net.minecraft.server.v1_9_R1.SystemUtils.a(SourceFile:45) [spigot49.jar:git-Spigot-f04e043-52c7fc0]
	at net.minecraft.server.v1_9_R1.MinecraftServer.D(MinecraftServer.java:721) [spigot49.jar:git-Spigot-f04e043-52c7fc0]
	at net.minecraft.server.v1_9_R1.DedicatedServer.D(DedicatedServer.java:400) [spigot49.jar:git-Spigot-f04e043-52c7fc0]
	at net.minecraft.server.v1_9_R1.MinecraftServer.C(MinecraftServer.java:660) [spigot49.jar:git-Spigot-f04e043-52c7fc0]
	at net.minecraft.server.v1_9_R1.MinecraftServer.run(MinecraftServer.java:559) [spigot49.jar:git-Spigot-f04e043-52c7fc0]
	at java.lang.Thread.run(Thread.java:745) [?:1.7.0_80]
Caused by: java.lang.IllegalArgumentException: Potion Type must not be null
	at org.apache.commons.lang.Validate.notNull(Validate.java:192) ~[spigot49.jar:git-Spigot-f04e043-52c7fc0]
	at org.bukkit.potion.PotionData.<init>(PotionData.java:22) ~[spigot49.jar:git-Spigot-f04e043-52c7fc0]
	at org.bukkit.craftbukkit.v1_9_R1.potion.CraftPotionUtil.toBukkit(CraftPotionUtil.java:80) ~[spigot49.jar:git-Spigot-f04e043-52c7fc0]
	at org.bukkit.craftbukkit.v1_9_R1.inventory.CraftMetaPotion.getBasePotionData(CraftMetaPotion.java:159) ~[spigot49.jar:git-Spigot-f04e043-52c7fc0]
	at regalowl.hyperconomy.bukkit.BukkitCommon.getSerializableItemStack(BukkitCommon.java:441) ~[?:?]
	at regalowl.hyperconomy.bukkit.BukkitCommon.getItem(BukkitCommon.java:648) ~[?:?]
	at regalowl.hyperconomy.bukkit.BukkitListener.onPlayerDropItemEvent(BukkitListener.java:287) ~[?:?]
	at sun.reflect.GeneratedMethodAccessor795.invoke(Unknown Source) ~[?:?]
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[?:1.7.0_80]
	at java.lang.reflect.Method.invoke(Method.java:606) ~[?:1.7.0_80]
	at org.bukkit.plugin.java.JavaPluginLoader$1.execute(JavaPluginLoader.java:306) ~[spigot49.jar:git-Spigot-f04e043-52c7fc0]
	... 18 more