[04:12:20] [Server thread/INFO]: ERROR! Unknown determination 'i@FLoatingPot'
[04:12:20] [Server thread/ERROR]: Encountered an unexpected exception
net.minecraft.server.v1_9_R1.ReportedException: Exception while ticking a block
at net.minecraft.server.v1_9_R1.MinecraftServer.D(MinecraftServer.java:877) ~[patched_1.9.jar:git-Paper-604]
at net.minecraft.server.v1_9_R1.DedicatedServer.D(DedicatedServer.java:404) ~[patched_1.9.jar:git-Paper-604]
at net.minecraft.server.v1_9_R1.MinecraftServer.C(MinecraftServer.java:720) ~[patched_1.9.jar:git-Paper-604]
at net.minecraft.server.v1_9_R1.MinecraftServer.run(MinecraftServer.java:619) [patched_1.9.jar:git-Paper-604]
at java.lang.Thread.run(Unknown Source) [?:1.8.0_77]
Caused by: java.lang.NullPointerException
at org.bukkit.craftbukkit.v1_9_R1.inventory.CraftMetaPotion.equalsCommon(CraftMetaPotion.java:277) ~[patched_1.9.jar:git-Paper-604]
at org.bukkit.craftbukkit.v1_9_R1.inventory.CraftItemFactory.equals(CraftItemFactory.java:151) ~[patched_1.9.jar:git-Paper-604]
at org.bukkit.craftbukkit.v1_9_R1.inventory.CraftItemFactory.equals(CraftItemFactory.java:138) ~[patched_1.9.jar:git-Paper-604]
at org.bukkit.inventory.ItemStack.isSimilar(ItemStack.java:338) ~[patched_1.9.jar:git-Paper-604]
at org.bukkit.inventory.ItemStack.equals(ItemStack.java:320) ~[patched_1.9.jar:git-Paper-604]
at net.minecraft.server.v1_9_R1.DispenseBehaviorProjectile.b(DispenseBehaviorProjectile.java:34) ~[patched_1.9.jar:git-Paper-604]
at net.minecraft.server.v1_9_R1.DispenseBehaviorItem.a(DispenseBehaviorItem.java:13) ~[patched_1.9.jar:git-Paper-604]
at net.minecraft.server.v1_9_R1.DispenserRegistry$7.a(DispenserRegistry.java:88) ~[patched_1.9.jar:git-Paper-604]
at net.minecraft.server.v1_9_R1.DispenseBehaviorProjectile.b(DispenseBehaviorProjectile.java:40) ~[patched_1.9.jar:git-Paper-604]
at net.minecraft.server.v1_9_R1.DispenseBehaviorItem.a(DispenseBehaviorItem.java:13) ~[patched_1.9.jar:git-Paper-604]
at net.minecraft.server.v1_9_R1.DispenserRegistry$7.a(DispenserRegistry.java:88) ~[patched_1.9.jar:git-Paper-604]
at net.minecraft.server.v1_9_R1.BlockDispenser.dispense(BlockDispenser.java:86) ~[patched_1.9.jar:git-Paper-604]
at net.minecraft.server.v1_9_R1.BlockDispenser.b(BlockDispenser.java:115) ~[patched_1.9.jar:git-Paper-604]
at net.minecraft.server.v1_9_R1.WorldServer.a(WorldServer.java:771) ~[patched_1.9.jar:git-Paper-604]
at net.minecraft.server.v1_9_R1.WorldServer.doTick(WorldServer.java:247) ~[patched_1.9.jar:git-Paper-604]
at net.minecraft.server.v1_9_R1.MinecraftServer.D(MinecraftServer.java:866) ~[patched_1.9.jar:git-Paper-604]
... 4 more
[04:12:20] [Server thread/ERROR]: Cause of unexpected exception was
java.lang.NullPointerException
at org.bukkit.craftbukkit.v1_9_R1.inventory.CraftMetaPotion.equalsCommon(CraftMetaPotion.java:277) ~[patched_1.9.jar:git-Paper-604]
at org.bukkit.craftbukkit.v1_9_R1.inventory.CraftItemFactory.equals(CraftItemFactory.java:151) ~[patched_1.9.jar:git-Paper-604]
at org.bukkit.craftbukkit.v1_9_R1.inventory.CraftItemFactory.equals(CraftItemFactory.java:138) ~[patched_1.9.jar:git-Paper-604]
at org.bukkit.inventory.ItemStack.isSimilar(ItemStack.java:338) ~[patched_1.9.jar:git-Paper-604]
at org.bukkit.inventory.ItemStack.equals(ItemStack.java:320) ~[patched_1.9.jar:git-Paper-604]
at net.minecraft.server.v1_9_R1.DispenseBehaviorProjectile.b(DispenseBehaviorProjectile.java:34) ~[patched_1.9.jar:git-Paper-604]
at net.minecraft.server.v1_9_R1.DispenseBehaviorItem.a(DispenseBehaviorItem.java:13) ~[patched_1.9.jar:git-Paper-604]
at net.minecraft.server.v1_9_R1.DispenserRegistry$7.a(DispenserRegistry.java:88) ~[patched_1.9.jar:git-Paper-604]
at net.minecraft.server.v1_9_R1.DispenseBehaviorProjectile.b(DispenseBehaviorProjectile.java:40) ~[patched_1.9.jar:git-Paper-604]
at net.minecraft.server.v1_9_R1.DispenseBehaviorItem.a(DispenseBehaviorItem.java:13) ~[patched_1.9.jar:git-Paper-604]
at net.minecraft.server.v1_9_R1.DispenserRegistry$7.a(DispenserRegistry.java:88) ~[patched_1.9.jar:git-Paper-604]
at net.minecraft.server.v1_9_R1.BlockDispenser.dispense(BlockDispenser.java:86) ~[patched_1.9.jar:git-Paper-604]
at net.minecraft.server.v1_9_R1.BlockDispenser.b(BlockDispenser.java:115) ~[patched_1.9.jar:git-Paper-604]
at net.minecraft.server.v1_9_R1.WorldServer.a(WorldServer.java:771) ~[patched_1.9.jar:git-Paper-604]
at net.minecraft.server.v1_9_R1.WorldServer.doTick(WorldServer.java:247) ~[patched_1.9.jar:git-Paper-604]
at net.minecraft.server.v1_9_R1.MinecraftServer.D(MinecraftServer.java:866) ~[patched_1.9.jar:git-Paper-604]
at net.minecraft.server.v1_9_R1.DedicatedServer.D(DedicatedServer.java:404) ~[patched_1.9.jar:git-Paper-604]
at net.minecraft.server.v1_9_R1.MinecraftServer.C(MinecraftServer.java:720) ~[patched_1.9.jar:git-Paper-604]
at net.minecraft.server.v1_9_R1.MinecraftServer.run(MinecraftServer.java:619) [patched_1.9.jar:git-Paper-604]
at java.lang.Thread.run(Unknown Source) [?:1.8.0_77]