Get an error message by using Economics

Hi, I will get an error message if I change currency to economics

"Currencies": {
    "0": {
      "ID": 0,
      "Title": "RP",
      "Icon": null,
      "Type (Plugin/Item)": "Plugin",
      "Plugin name": "Economics",
      "Balance add hook": null,
      "Balance remove hook": null,
      "Balance show hook": null,
      "ShortName": "scrap",
      "Display Name (empty - default)": null,
      "Skin": 0
    }
  }

Failed to call hook '' on plugin 'Economics v3.9.2' (ArgumentNullException: Key cannot be null.
Parameter name: key)
  at System.Collections.Hashtable.get_Item (System.Object key) [0x00003] in <d49d4cb128564ee1b54a84338c98d353>:0
  at Oxide.Core.Plugins.HookCache.GetOrAdd (System.Object key) [0x00000] in <db058accaef24d86af67c0d18d641acb>:0
  at Oxide.Core.Plugins.HookCache.GetHookMethod (System.String hookName, System.Object[] args, Oxide.Core.Plugins.HookCache& cache) [0x00000] in <db058accaef24d86af67c0d18d641acb>:0
  at Oxide.Core.Plugins.CSPlugin.FindHooks (System.String name, System.Object[] args) [0x00000] in <db058accaef24d86af67c0d18d641acb>:0
  at Oxide.Core.Plugins.CSPlugin.OnCallHook (System.String name, System.Object[] args) [0x00004] in <db058accaef24d86af67c0d18d641acb>:0
  at Oxide.Core.Plugins.Plugin.CallHook (System.String hook, System.Object[] args) [0x00060] in <db058accaef24d86af67c0d18d641acb>:0

Please help.

Thanks, it's working now.

Maybe you should write smth about that in your readme or so

Thanks again.