Impossible to insert a structure.

Failed to call hook 'cmdChatPaste' on plugin 'CopyPaste v3.6.7' (NullReferenceEx
ception: Object reference not set to an instance of an object)
  at Oxide.Plugins.CopyPaste.TryPaste (UnityEngine.Vector3 startPos, System.Stri
ng filename, BasePlayer player, System.Single RotationCorrection, System.String[
] args, System.Boolean autoHeight) [0x000a1] in <99d2a6feb5c44dbe9b9c62205504b9d
0>:0
  at Oxide.Plugins.CopyPaste.TryPasteFromSteamID (System.UInt64 userID, System.S
tring filename, System.String[] args) [0x0008b] in <99d2a6feb5c44dbe9b9c62205504
b9d0>:0
  at Oxide.Plugins.CopyPaste.cmdChatPaste (BasePlayer player, System.String comm
and, System.String[] args) [0x0007b] in <99d2a6feb5c44dbe9b9c62205504b9d0>:0
  at Oxide.Plugins.CopyPaste.DirectCallHook (System.String name, System.Object&
ret, System.Object[] args) [0x00941] in <99d2a6feb5c44dbe9b9c62205504b9d0>:0
  at Oxide.Plugins.CSharpPlugin.InvokeMethod (Oxide.Core.Plugins.HookMethod meth
od, 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[] arg
s) [0x00060] in <4452f821def6406d834e4149849fe7ea>:0
Calling 'cmdChatPaste' on 'CopyPaste v3.6.7' took 206ms​

Command / copy does not give any sign of life. Only the console swears in red:

Failed to call hook 'cmdChatCopy' on plugin 'CopyPaste v3.6.7' (NullReferenceExc
eption: Object reference not set to an instance of an object)
  at Oxide.Plugins.CopyPaste.TryCopy (UnityEngine.Vector3 sourcePos, UnityEngine
.Vector3 sourceRot, System.String filename, System.Single RotationCorrection, Sy
stem.String[] args) [0x0000b] in <99d2a6feb5c44dbe9b9c62205504b9d0>:0
  at Oxide.Plugins.CopyPaste.TryCopyFromSteamID (System.UInt64 userID, System.St
ring filename, System.String[] args) [0x0009e] in <99d2a6feb5c44dbe9b9c62205504b
9d0>:0
  at Oxide.Plugins.CopyPaste.cmdChatCopy (BasePlayer player, System.String comma
nd, System.String[] args) [0x0007d] in <99d2a6feb5c44dbe9b9c62205504b9d0>:0
  at Oxide.Plugins.CopyPaste.DirectCallHook (System.String name, System.Object&
ret, System.Object[] args) [0x00889] in <99d2a6feb5c44dbe9b9c62205504b9d0>:0
  at Oxide.Plugins.CSharpPlugin.InvokeMethod (Oxide.Core.Plugins.HookMethod meth
od, 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[] arg
s) [0x00060] in <4452f821def6406d834e4149849fe7ea>:0​