Exception (cs:61328): NullReferenceException: Object reference not set to an instance of an object. TechTreeEntry.Refresh () (at <00000000000000000000000000000000>:0) TechTreeDialog.OnInventoryChanged () (at <00000000000000000000000000000000>:0) GlobalMessages.OnInventoryChanged () (at <00000000000000000000000000000000>:0) BasePlayer.OnRpcMessage (BasePlayer player, System.UInt32 rpc, Network.Message msg) (at <00000000000000000000000000000000>:0) BaseEntity.CL_RPCMessage (System.UInt32 nameID, System.UInt64 sourceConnection, Network.Message message) (at <00000000000000000000000000000000>:0) Client.OnRPCMessage (Network.Message packet) (at <00000000000000000000000000000000>:0) Client.OnNetworkMessage (Network.Message packet) (at <00000000000000000000000000000000>:0) Facepunch.Network.Raknet.Client.HandleMessage () (at <00000000000000000000000000000000>:0) Facepunch.Network.Raknet.Client.Cycle () (at <00000000000000000000000000000000>:0) Client.Update () (at <00000000000000000000000000000000>:0) UnityEngine.Debug:LogException(Exception) BasePlayer:OnRpcMessage(BasePlayer, UInt32, Message) BaseEntity:CL_RPCMessage(UInt32, UInt64, Message) Client:OnRPCMessage(Message) Client:OnNetworkMessage(Message) Facepunch.Network.Raknet.Client:HandleMessage() Facepunch.Network.Raknet.Client:Cycle() Client:Update()