15:52:06 [Server Warning] Exception at client 36. Disconnecting client.
15:52:06 [Server Event] Player RhonynBlack got removed. Reason: Threw an exception at the server
15:52:06 [Server Error] System.NullReferenceException: Object reference not set to an instance of an object
  at XSkills.BlockEntityBarrelPatch.Postfix (Vintagestory.GameContent.BlockEntityBarrel __instance, Vintagestory.API.Common.IPlayer player, System.Int32 packetid) [0x00041] in <df28b000f4d6470c8a9f49169399f091>:0
  at (wrapper dynamic-method) Vintagestory.GameContent.BlockEntityBarrel.Vintagestory.GameContent.BlockEntityBarrel.OnReceivedClientPacket_Patch1(Vintagestory.GameContent.BlockEntityBarrel,Vintagestory.API.Common.IPlayer,int,byte[])
  at Vintagestory.Server.ServerSystemBlockSimulation.HandleBlockEntityPacket (Packet_Client packet, Vintagestory.Server.ConnectedClient client) [0x00032] in <16b3881dc04144ad96fccb493b1e65ac>:0
  at Vintagestory.Server.ServerMain.HandleClientPacket (Vintagestory.Server.ConnectedClient client, System.Byte[] data) [0x0005a] in <16b3881dc04144ad96fccb493b1e65ac>:0
  at Vintagestory.Server.ServerMain.ProcessNetMessage (Vintagestory.Common.NetIncomingMessage msg, Vintagestory.Common.NetServer mainSocket) [0x00151] in <16b3881dc04144ad96fccb493b1e65ac>:0