Error Message after cmd /convoyrootsave, Please help

Failed to call hook 'RootSaveCommand' on plugin 'Convoy v2.4.9' (NullReferenceException: Object reference not set to an instance of an object)
  at Oxide.Plugins.Convoy+RootCar.SaveRoot (BasePlayer player, System.String rootName) [0x00084] in <d7c421f0b09f4f149782a7fc5b8586e6>:0 slprs                                                                             3kb/s in, 18kb/s out
  at Oxide.Plugins.Convoy.RootSaveCommand (BasePlayer player, System.String command, System.String[] arg) [0x00031] in <d7c421f0b09f4f149782a7fc5b8586e6>:0
  at Oxide.Plugins.Convoy.DirectCallHook (System.String name, System.Object& ret, System.Object[] args) [0x01c9f] in <d7c421f0b09f4f149782a7fc5b8586e6>:0
  at Oxide.Plugins.CSharpPlugin.InvokeMethod (Oxide.Core.Plugins.HookMethod method, System.Object[] args) [0x00079] in <795304323ac74a298b8ed190a1dfa739>:0
  at Oxide.Core.Plugins.CSPlugin.OnCallHook (System.String name, System.Object[] args) [0x000de] in <beb2b64691c64e2b95b99491bd85442c>:0
  at Oxide.Core.Plugins.Plugin.CallHook (System.String hook, System.Object[] args) [0x00060] in <beb2b64691c64e2b95b99491bd85442c>:0

Hello! enter /convoyrootsave routeName

Changed Status from Pending to Work in Progress

Hi, i did /convoyrootsave red 

and then the error appears at my console.

I also tried other names and restarting server, download the cs again, but nothing changes..
This appears since i wiped the server today with a new pre. Map.

Hi,  

I deleted all files now and tried it again, everything is working fine know. 

thanks a lot.

Changed Status from Pending to Closed