Updated the plugin to the latest version (1.1.8) and I get the following error:
Failed to call hook 'CmdConsoleHandler' on plugin 'BuildingSkins v1.1.8' (NullReferenceException: Object reference not set to an instance of an object)
at Oxide.Plugins.BuildingSkins.CmdConsoleHandler (ConsoleSystem+Arg arg) [0x00215] in <4a66c8a27dd248fbbc7cc7181246f1c5>:0
at Oxide.Plugins.BuildingSkins.DirectCallHook (System.String name, System.Object& ret, System.Object[] args) [0x0049b] in <4a66c8a27dd248fbbc7cc7181246f1c5>:0
at Oxide.Plugins.CSharpPlugin.InvokeMethod (Oxide.Core.Plugins.HookMethod method, System.Object[] args) [0x00079] in <cd9a02fd331347bd82d550bb1a9c8e9f>:0
at Oxide.Core.Plugins.CSPlugin.OnCallHook (System.String name, System.Object[] args) [0x000d8] in <b76ec77c47d1449e92b2baab8603843d>:0
at Oxide.Core.Plugins.Plugin.CallHook (System.String hook, System.Object[] args) [0x00060] in <b76ec77c47d1449e92b2baab8603843d>:0