Spawning the carpet only gives you the sound and no carpet.  Console reports this with latest version of oxide installed.

[Oxide] 15:48 [Error] Failed to call hook 'attachCMD' on plugin 'MagicCarpet v1.0.1' (NullReferenceException: )
  at (wrapper managed-to-native) UnityEngine.Component.GetComponentFastPath(UnityEngine.Component,System.Type,intptr)
  at UnityEngine.Component.GetComponent[T] () [0x00020] in <7848bf5ffb154531ab6a4765738d835a>:0 
  at Oxide.Plugins.MagicCarpet.attachCMD (BasePlayer player, System.String command, System.String[] args) [0x00091] in <3e955fb992a442e594f4f452f7b43c5b>:0 
  at Oxide.Plugins.MagicCarpet.DirectCallHook (System.String name, System.Object& ret, System.Object[] args) [0x001ac] in <3e955fb992a442e594f4f452f7b43c5b>:0 
  at Oxide.Plugins.CSharpPlugin.InvokeMethod (Oxide.Core.Plugins.HookMethod method, System.Object[] args) [0x00079] in <9affce1cd15c4ec183941adef8db1722>:0 
  at Oxide.Core.Plugins.CSPlugin.OnCallHook (System.String name, System.Object[] args) [0x000d8] in <4452f821def6406d834e4149849fe7ea>:0 
  at Oxide.Core.Plugins.Plugin.CallHook (System.String hook, System.Object[] args) [0x00060] in <4452f821def6406d834e4149849fe7ea>:0 

oxide.version

[Oxide] 15:48 [Info] Protocol: 2112.169.1
Build Date: 09/06/2018 09:31:47
Unity Version: 2018.1.4f1
Changeset: 28466
Branch: release
Oxide.Rust Version: 2.0.4025​

That isn't the same plugn as this, that is the Magic Carpet plugin.

Oops, forgot to mention I renamed the plugin to magic carpet 

I am not seeing this on my server - same versions of software.  I am seeing the skins for chair and carpet disappear, which I'll look into.

By the way, please download a fresh copy (newest version), and I ask that you not rename it.