Cannot display UI Custom Button

Already confirmed:
"Should show a custom button on the Hud? (default = false)": true
But the button still does not appear.

[Error] Failed to call hook 'CmdSelectItem' on plugin 'AdvancedItemCrafting v1.0.1' (NullReferenceException: Object reference not set to an instance of an object.)
  at Oxide.Plugins.AdvancedItemCrafting+BaseItem..ctor (Item item) [0x00006] in <e613bb8b55c443b88ea3dee053dca49c>:0
  at Oxide.Plugins.AdvancedItemCrafting.EpicBuffDescription (Oxide.Plugins.AdvancedItemCrafting+ExtendedCuiElementContainer builder, BasePlayer player, Oxide.Plugins.AdvancedItemCrafting+Buff selectedBuff) [0x005af] in <e613bb8b55c443b88ea3dee053dca49c>:0
  at Oxide.Plugins.AdvancedItemCrafting.CmdSelectItem (ConsoleSystem+Arg arg) [0x0007a] in <e613bb8b55c443b88ea3dee053dca49c>:0
  at Oxide.Plugins.AdvancedItemCrafting.DirectCallHook (System.String name, System.Object& ret, System.Object[] args) [0x00a53] in <e613bb8b55c443b88ea3dee053dca49c>:0
  at Oxide.Plugins.CSharpPlugin.InvokeMethod (Oxide.Core.Plugins.HookMethod method, System.Object[] args) [0x00079] in <9c80d821d00a44c9a24497c73ad2d20d>:0
  at Oxide.Core.Plugins.CSPlugin.OnCallHook (System.String name, System.Object[] args) [0x000de] in <d646191a355d43a6b3ab36b7ee14c740>:0
  at Oxide.Core.Plugins.Plugin.CallHook (System.String hook, System.Object[] args) [0x00060] in <d646191a355d43a6b3ab36b7ee14c740>:0

Looking into it today. Guess your error is not related to the button.

Planned already another update for buttons in general to give some more advanced options for configurations.

Changed Status from Pending to Work in Progress

I will apply a fix for the method you pointed out.

But it looks like there is something wrong with you epic config.

I would also recommend that you join the discord of epic loot owner, there i can give you better support for it.

Changed Fixed In to Next Version

Changed Status from Work in Progress to Fixed