I get this in console when I spawn a trader:
Failed to call hook 'CmdChatSpawn' on plugin 'NPCShop v2.11.2' (NullReferenceException: Object reference not set to an instance of an object)
at Oxide.Plugins.NPCShop+RefillChecker.LoadFromData () [0x00000] in <5d2efdb441dd46b1a3839656a34e635f>:0
at Oxide.Plugins.NPCShop+RefillChecker.Init (VendingMachine vendingMachine, System.Boolean useRefillCheck) [0x00023] in <5d2efdb441dd46b1a3839656a34e635f>:0
at Oxide.Plugins.NPCShop.CreateShopMarker (Oxide.Plugins.NPCShop+ShopBase npcShop) [0x00124] in <5d2efdb441dd46b1a3839656a34e635f>:0
at Oxide.Plugins.NPCShop.SpawnBot (BasePlayer initiator) [0x001fb] in <5d2efdb441dd46b1a3839656a34e635f>:0
at Oxide.Plugins.NPCShop.CmdChatSpawn (BasePlayer player, System.String command, System.String[] args) [0x0004f] in <5d2efdb441dd46b1a3839656a34e635f>:0
at Oxide.Plugins.NPCShop.DirectCallHook (System.String name, System.Object& ret, System.Object[] args) [0x0068f] in <5d2efdb441dd46b1a3839656a34e635f>:0
at Oxide.Plugins.CSharpPlugin.InvokeMethod (Oxide.Core.Plugins.HookMethod method, System.Object[] args) [0x00079] in <42f9bedc659b4f4786eb778d3cd58968>:0
at Oxide.Core.Plugins.CSPlugin.OnCallHook (System.String name, System.Object[] args) [0x000de] in <15f61ddda771464d8246ebdce8ff4811>:0