[00:44:01] [Server thread/INFO] [nucleus]: ziceptor ran the command: /shop browse
[00:44:19] [Server thread/INFO] [nucleus]: ziceptor ran the command: /sponge:callback 51c4c86d-2bf8-403b-a50f-28b538eb92df
[00:44:27] [Server thread/INFO] [nucleus]: ziceptor ran the command: /shop item buy 0 1 f11dcd6b-9d2c-441e-a833-07ea4e39f83d
[00:44:37] [Server thread/INFO] [nucleus]: ziceptor ran the command: /shop browse
[00:44:39] [Server thread/INFO] [nucleus]: ziceptor ran the command: /sponge:callback d8805a71-0874-4e94-baa7-aa28b46eb950
[00:44:41] [Server thread/INFO] [nucleus]: ziceptor ran the command: /shop item sell 0 1 f11dcd6b-9d2c-441e-a833-07ea4e39f83d
[00:44:41] [Server thread/ERROR] [Sponge]: Error occurred while executing command 'shop item sell 0 1 f11dcd6b-9d2c-441e-a833-07ea4e39f83d' for source EntityPlayerMP['z
ceptor'/281, l='world', x=22912,85, y=66,00, z=16731,02]: null
java.lang.NullPointerException
        at io.github.zerthick.playershopsrpg.utils.messages.Messages.processDropins(Messages.java:166) ~[Messages.class:?]
        at io.github.zerthick.playershopsrpg.shop.Shop.buyItem(Shop.java:145) ~[Shop.class:?]
        at io.github.zerthick.playershopsrpg.cmd.cmdexecutors.shop.item.ShopSellItemExecutor.lambda$execute$29(ShopSellItemExecutor.java:50) ~[ShopSellItemExecutor.clas
:?]
        at io.github.zerthick.playershopsrpg.cmd.cmdexecutors.AbstractShopTransactionCmdExecutor.executeTransaction(AbstractShopTransactionCmdExecutor.java:58) ~[Abstra
tShopTransactionCmdExecutor.class:?]
        at io.github.zerthick.playershopsrpg.cmd.cmdexecutors.shop.item.ShopSellItemExecutor.execute(ShopSellItemExecutor.java:43) ~[ShopSellItemExecutor.class:?]
        at org.spongepowered.api.command.args.ChildCommandElementExecutor.execute(ChildCommandElementExecutor.java:179) ~[ChildCommandElementExecutor.class:1.11-2178-6.
.0-BETA-1988]
        at org.spongepowered.api.command.args.ChildCommandElementExecutor.execute(ChildCommandElementExecutor.java:179) ~[ChildCommandElementExecutor.class:1.11-2178-6.
.0-BETA-1988]
        at org.spongepowered.api.command.spec.CommandSpec.process(CommandSpec.java:351) ~[CommandSpec.class:1.11-2178-6.0.0-BETA-1988]
        at org.spongepowered.api.command.dispatcher.SimpleDispatcher.process(SimpleDispatcher.java:333) ~[SimpleDispatcher.class:1.11-2178-6.0.0-BETA-1988]
        at org.spongepowered.common.command.SpongeCommandManager.process(SpongeCommandManager.java:291) [SpongeCommandManager.class:1.11-2178-6.0.0-BETA-1988]
        at io.github.zerthick.playershopsrpg.cmd.callback.CallBackBuffer.executeCallBack(CallBackBuffer.java:60) [CallBackBuffer.class:?]
        at io.github.zerthick.playershopsrpg.PlayerShopsRPG.onPlayerSendChat(PlayerShopsRPG.java:167) [PlayerShopsRPG.class:?]
        at org.spongepowered.common.event.listener.ChatListener_PlayerShopsRPG_onPlayerSendChat48.handle(Unknown Source) [?:?]
        at org.spongepowered.common.event.RegisteredListener.handle(RegisteredListener.java:95) [RegisteredListener.class:1.11-2178-6.0.0-BETA-1988]
        at org.spongepowered.mod.event.SpongeModEventManager.post(SpongeModEventManager.java:301) [SpongeModEventManager.class:1.11-2178-6.0.0-BETA-1988]
        at org.spongepowered.mod.event.SpongeModEventManager.post(SpongeModEventManager.java:260) [SpongeModEventManager.class:1.11-2178-6.0.0-BETA-1988]
        at net.minecraftforge.fml.common.eventhandler.EventBus.postForgeAndCreateSpongeEvent(EventBus.java:100) [EventBus.class:?]
        at net.minecraft.network.NetHandlerPlayServer.handler$injectChatEvent$zof000(NetHandlerPlayServer.java:74) [mi.class:?]
        at net.minecraft.network.NetHandlerPlayServer.func_147354_a(NetHandlerPlayServer.java:877) [mi.class:?]
        at net.minecraft.network.play.client.CPacketChatMessage.func_148833_a(SourceFile:37) [ip.class:?]
        at net.minecraft.network.play.client.CPacketChatMessage.func_148833_a(SourceFile:9) [ip.class:?]
        at org.spongepowered.common.network.PacketUtil.onProcessPacket(PacketUtil.java:136) [PacketUtil.class:1.11-2178-6.0.0-BETA-1988]
        at net.minecraft.network.PacketThreadUtil$1.redirect$onProcessPacket$zjb000(SourceFile:39) [fo$1.class:?]
        at net.minecraft.network.PacketThreadUtil$1.run(SourceFile:13) [fo$1.class:?]
        at java.util.concurrent.Executors$RunnableAdapter.call(Unknown Source) [?:1.8.0_112]
        at java.util.concurrent.FutureTask.run(Unknown Source) [?:1.8.0_112]
        at net.minecraft.util.Util.func_181617_a(SourceFile:46) [h.class:?]
        at net.minecraft.server.MinecraftServer.func_71190_q(MinecraftServer.java:679) [MinecraftServer.class:?]
        at net.minecraft.server.dedicated.DedicatedServer.func_71190_q(DedicatedServer.java:384) [lh.class:?]
        at net.minecraft.server.MinecraftServer.func_71217_p(MinecraftServer.java:624) [MinecraftServer.class:?]
        at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:482) [MinecraftServer.class:?]
        at java.lang.Thread.run(Unknown Source) [?:1.8.0_112]
>