same here there are a lot of console errors:
Failed to call hook 'OnItemAction' on plugin 'SkillTreeItems v1.0.2' (NullReferenceException: Object reference not set to an instance of an object) at Oxide.Plugins.SkillTreeItems.IsXPItem (Item item) [0x00000] in <756bc0ab25ad4a99ba52a64966cdcf48>:0 at Oxide.Plugins.SkillTreeItems.OnItemAction (Item item, System.String action, BasePlayer player) [0x00031] in <756bc0ab25ad4a99ba52a64966cdcf48>:0 at Oxide.Plugins.SkillTreeItems.DirectCallHook (System.String name, System.Object& ret, System.Object[] args) [0x008f0] in <756bc0ab25ad4a99ba52a64966cdcf48>:0 at Oxide.Plugins.CSharpPlugin.InvokeMethod (Oxide.Core.Plugins.HookMethod method, System.Object[] args) [0x00079] in <206a0f2c6ee141f38e2ad549cde44d70>:0 at Oxide.Core.Plugins.CSPlugin.OnCallHook (System.String name, System.Object[] args) [0x000de] in <beb2b64691c64e2b95b99491bd85442c>:0 at Oxide.Core.Plugins.Plugin.CallHook (System.String hook, System.Object[] args) [0x00060] in <beb2b64691c64e2b95b99491bd85442c>:0