[17:15:10] [WARN] java.lang.ClassNotFoundException: net/minecraft/server/v1_7_R4/NBTTagCompound
[17:15:10] [WARN] at java.lang.Class.forName0(Native Method)
[17:15:10] [WARN] at java.lang.Class.forName(Class.java:264)
[17:15:10] [WARN] at net.cfilatov.auctionhouse.data.DataHandler.getNMSClass(DataHandler.java:421)
[17:15:10] [WARN] at net.cfilatov.auctionhouse.data.DataHandler.serializeItemStack(DataHandler.java:362)
[17:15:10] [WARN] at net.cfilatov.auctionhouse.data.DataHandler.saveListing(DataHandler.java:168)
[17:15:10] [WARN] at net.cfilatov.auctionhouse.controller.Controller.sell(Controller.java:79)
[17:15:10] [WARN] at net.cfilatov.auctionhouse.commands.CommandHandler.handleAuctionSell(CommandHandler.java:105)
[17:15:10] [WARN] at net.cfilatov.auctionhouse.commands.CommandHandler.onCommand(CommandHandler.java:68)
[17:15:10] [WARN] at org.bukkit.command.PluginCommand.execute(PluginCommand.java:44)
[17:15:10] [WARN] at org.bukkit.command.SimpleCommandMap.dispatch(SimpleCommandMap.java:181)
[17:15:10] [WARN] at org.bukkit.craftbukkit.v1_7_R4.CraftServer.dispatchCommand(CraftServer.java:740)
[17:15:10] [WARN] at net.minecraft.network.NetHandlerPlayServer.func_147361_d(NetHandlerPlayServer.java:1370)
[17:15:10] [WARN] at net.minecraft.network.NetHandlerPlayServer.func_147354_a(NetHandlerPlayServer.java:1107)
[17:15:10] [WARN] at net.minecraft.network.play.client.C01PacketChatMessage.func_148833_a(C01PacketChatMessage.java:38)
[17:15:10] [WARN] at net.minecraft.network.play.client.C01PacketChatMessage.func_148833_a(C01PacketChatMessage.java:53)
[17:15:10] [WARN] at net.minecraft.network.NetworkManager.func_74428_b(NetworkManager.java:245)
[17:15:10] [WARN] at net.minecraft.network.NetworkSystem.func_151269_c(NetworkSystem.java:181)
[17:15:10] [WARN] at net.minecraft.server.MinecraftServer.func_71190_q(MinecraftServer.java:1023)
[17:15:10] [WARN] at net.minecraft.server.dedicated.DedicatedServer.func_71190_q(DedicatedServer.java:432)
[17:15:10] [WARN] at net.minecraft.server.MinecraftServer.func_71217_p(MinecraftServer.java:841)
[17:15:10] [WARN] at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:693)
[17:15:10] [WARN] at java.lang.Thread.run(Thread.java:748)
[17:15:10] [WARN] Unable to find reflection class net.minecraft.server.v1_7_R4.NBTTagCompound!
[17:15:10] [WARN] java.lang.NullPointerException
[17:15:10] [WARN] at net.cfilatov.auctionhouse.data.DataHandler.serializeItemStack(DataHandler.java:363)
[17:15:10] [WARN] at net.cfilatov.auctionhouse.data.DataHandler.saveListing(DataHandler.java:168)
[17:15:10] [WARN] at net.cfilatov.auctionhouse.controller.Controller.sell(Controller.java:79)
[17:15:10] [WARN] at net.cfilatov.auctionhouse.commands.CommandHandler.handleAuctionSell(CommandHandler.java:105)
[17:15:10] [WARN] at net.cfilatov.auctionhouse.commands.CommandHandler.onCommand(CommandHandler.java:68)
[17:15:10] [WARN] at org.bukkit.command.PluginCommand.execute(PluginCommand.java:44)
[17:15:10] [WARN] at org.bukkit.command.SimpleCommandMap.dispatch(SimpleCommandMap.java:181)
[17:15:10] [WARN] at org.bukkit.craftbukkit.v1_7_R4.CraftServer.dispatchCommand(CraftServer.java:740)
[17:15:10] [WARN] at net.minecraft.network.NetHandlerPlayServer.func_147361_d(NetHandlerPlayServer.java:1370)
[17:15:10] [WARN] at net.minecraft.network.NetHandlerPlayServer.func_147354_a(NetHandlerPlayServer.java:1107)
[17:15:10] [WARN] at net.minecraft.network.play.client.C01PacketChatMessage.func_148833_a(C01PacketChatMessage.java:38)
[17:15:10] [WARN] at net.minecraft.network.play.client.C01PacketChatMessage.func_148833_a(C01PacketChatMessage.java:53)
[17:15:10] [WARN] at net.minecraft.network.NetworkManager.func_74428_b(NetworkManager.java:245)
[17:15:10] [WARN] at net.minecraft.network.NetworkSystem.func_151269_c(NetworkSystem.java:181)
[17:15:10] [WARN] at net.minecraft.server.MinecraftServer.func_71190_q(MinecraftServer.java:1023)
[17:15:10] [WARN] at net.minecraft.server.dedicated.DedicatedServer.func_71190_q(DedicatedServer.java:432)
[17:15:10] [WARN] at net.minecraft.server.MinecraftServer.func_71217_p(MinecraftServer.java:841)
[17:15:10] [WARN] at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:693)
[17:15:10] [WARN] at java.lang.Thread.run(Thread.java:748)
[17:15:10] [ERROR] null
org.bukkit.command.CommandException: Unhandled exception executing command 'ah' in plugin AuctionHouse v3.3
at org.bukkit.command.PluginCommand.execute(PluginCommand.java:46) ~[PluginCommand.class:1.7.10-1614.58]
at org.bukkit.command.SimpleCommandMap.dispatch(SimpleCommandMap.java:181) ~[SimpleCommandMap.class:1.7.10-1614.58]
at org.bukkit.craftbukkit.v1_7_R4.CraftServer.dispatchCommand(CraftServer.java:740) ~[CraftServer.class:1.7.10-1614.58]
at net.minecraft.network.NetHandlerPlayServer.func_147361_d(NetHandlerPlayServer.java:1370) [nh.class:?]
at net.minecraft.network.NetHandlerPlayServer.func_147354_a(NetHandlerPlayServer.java:1107) [nh.class:?]
at net.minecraft.network.play.client.C01PacketChatMessage.func_148833_a(C01PacketChatMessage.java:38) [ir.class:?]
at net.minecraft.network.play.client.C01PacketChatMessage.func_148833_a(C01PacketChatMessage.java:53) [ir.class:?]
at net.minecraft.network.NetworkManager.func_74428_b(NetworkManager.java:245) [ej.class:?]
at net.minecraft.network.NetworkSystem.func_151269_c(NetworkSystem.java:181) [nc.class:?]
at net.minecraft.server.MinecraftServer.func_71190_q(MinecraftServer.java:1023) [MinecraftServer.class:?]
at net.minecraft.server.dedicated.DedicatedServer.func_71190_q(DedicatedServer.java:432) [lt.class:?]
at net.minecraft.server.MinecraftServer.func_71217_p(MinecraftServer.java:841) [MinecraftServer.class:?]
at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:693) [MinecraftServer.class:?]
at java.lang.Thread.run(Thread.java:748) [?:1.8.0_151]
Caused by: java.lang.NullPointerException
at net.cfilatov.auctionhouse.data.DataHandler.serializeItemStack(DataHandler.java:374) ~[?:?]
at net.cfilatov.auctionhouse.data.DataHandler.saveListing(DataHandler.java:168) ~[?:?]
at net.cfilatov.auctionhouse.controller.Controller.sell(Controller.java:79) ~[?:?]
at net.cfilatov.auctionhouse.commands.CommandHandler.handleAuctionSell(CommandHandler.java:105) ~[?:?]
at net.cfilatov.auctionhouse.commands.CommandHandler.onCommand(CommandHandler.java:68) ~[?:?]
at org.bukkit.command.PluginCommand.execute(PluginCommand.java:44) ~[PluginCommand.class:1.7.10-1614.58]
... 13 more