VIPs have the possibility to set their own clan tag on my server, is this an error that they made the command wrong or is it something else?

03:44 [Error] Failed to call hook 'ChangeClanTagOwner' on plugin 'ClanTags v0.8.0' (ArgumentOutOfRangeException: Index and length must refer to a location within the string.
Parameter name: length)
  at System.String.Substring (System.Int32 startIndex, System.Int32 length) [0x0006a] in <7d97106330684add86d080ecf65bfe69>:0 
  at Oxide.Plugins.ClanTags.ChangeClanTagOwner (Oxide.Core.Libraries.Covalence.IPlayer player, System.String command, System.String[] args) [0x00067] in <d75c55828e304b069f4f79b04b03ea16>:0 
  at Oxide.Plugins.ClanTags.DirectCallHook (System.String name, System.Object& ret, System.Object[] args) [0x0032c] in <d75c55828e304b069f4f79b04b03ea16>: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 

Failed to call hook 'ChangeClanTagOwner' on plugin 'ClanTags v0.8.0' (ArgumentOutOfRangeException: Index and length must refer to a location within the string.
Parameter name: length)
  at System.String.Substring (System.Int32 startIndex, System.Int32 length) [0x0006a] in :0
  at Oxide.Plugins.ClanTags.ChangeClanTagOwner (Oxide.Core.Libraries.Covalence.IPlayer player, System.String command, System.String[] args) [0x00067] in :0
  at Oxide.Plugins.ClanTags.DirectCallHook (System.String name, System.Object& ret, System.Object[] args) [0x0032c] in :0
  at Oxide.Plugins.CSharpPlugin.InvokeMethod (Oxide.Core.Plugins.HookMethod method, System.Object[] args) [0x00079] in <41771c7bc8d246d0b0a34c2f0d27f2cb>:0
  at Oxide.Core.Plugins.CSPlugin.OnCallHook (System.String name, System.Object[] args) [0x000d8] in :0
  at Oxide.Core.Plugins.Plugin.CallHook (System.String hook, System.Object[] args) [0x00060] in :0

Hi
When i try change color on my clan my server oxide logs:

20:28 [Error] Failed to call hook 'ChangeClanTagOwner' on plugin 'ClanTags v0.8.0' (ArgumentOutOfRangeException: Index and length must refer to a location within the string.
Parameter name: length)
  at System.String.Substring (System.Int32 startIndex, System.Int32 length) [0x0006a] in <fb001e01371b4adca20013e0ac763896>:0
  at Oxide.Plugins.ClanTags.ChangeClanTagOwner (Oxide.Core.Libraries.Covalence.IPlayer player, System.String command, System.String[] args) [0x00067] in <093ce529de10400c81b097e9f22c5726>:0
  at Oxide.Plugins.ClanTags.DirectCallHook (System.String name, System.Object& ret, System.Object[] args) [0x0032c] in <093ce529de10400c81b097e9f22c5726>:0
  at Oxide.Plugins.CSharpPlugin.InvokeMethod (Oxide.Core.Plugins.HookMethod method, System.Object[] args) [0x00079] in <80b90e8213db44b29ec2d4111764172c>:0
  at Oxide.Core.Plugins.CSPlugin.OnCallHook (System.String name, System.Object[] args) [0x000d8] in <ec05e0208c9149bba43236ca58fea105>:0
  at Oxide.Core.Plugins.Plugin.CallHook (System.String hook, System.Object[] args) [0x00060] in <ec05e0208c9149bba43236ca58fea105>:0