Getting error on console, can't open locker in game!

Hi, have huge problem regarding this 1st have error like this constantly in server console

Failed to call hook 'OnServerSave' on plugin 'PortableLocker v1.4.7' (NullReferenceException: Object reference not set to an instance of an object)
  at Oxide.Plugins.PortableLocker.SaveContainer () [0x0009d] in <a89eb21b21224ad7b14f841949f66996>:0 
  at Oxide.Plugins.PortableLocker.OnServerSave () [0x00008] in <a89eb21b21224ad7b14f841949f66996>:0 
  at Oxide.Plugins.PortableLocker.DirectCallHook (System.String name, System.Object& ret, System.Object[] args) [0x00168] in <a89eb21b21224ad7b14f841949f66996>:0 
  at Oxide.Plugins.CSharpPlugin.InvokeMethod (Oxide.Core.Plugins.HookMethod method, System.Object[] args) [0x00079] in <42f9bedc659b4f4786eb778d3cd58968>:0 
  at Oxide.Core.Plugins.CSPlugin.OnCallHook (System.String name, System.Object[] args) [0x000de] in <d59b507fd76240e5b62228d0eae39b73>:0 
  at Oxide.Core.Plugins.Plugin.CallHook (System.String hook, System.Object[] args) [0x00060] in <d59b507fd76240e5b62228d0eae39b73>:0

When try to open locker thru command showing this error on console

Failed to run command '/locker' on plugin 'PortableLocker'. (NullReferenceException: Object reference not set to an instance of an object)
  at Oxide.Plugins.PortableLocker.GetContainer (System.UInt64 steamId) [0x00010] in <5295c34c08f44e58b3c8657cc3c50c4c>:0 
  at Oxide.Plugins.PortableLocker.CreateLocker (System.UInt64 steamId, System.Boolean initial) [0x00052] in <5295c34c08f44e58b3c8657cc3c50c4c>:0 
  at Oxide.Plugins.PortableLocker.OpenLocker (BasePlayer player, System.String[] args) [0x000bb] in <5295c34c08f44e58b3c8657cc3c50c4c>:0 
  at Oxide.Plugins.PortableLocker.<InstallCommands>b__48_0 (BasePlayer player, System.String command, System.String[] args) [0x00000] in <5295c34c08f44e58b3c8657cc3c50c4c>:0 
  at Oxide.Game.Rust.Libraries.Command+ChatCommand.HandleCommand (BasePlayer sender, System.String name, System.String[] args) [0x0001b] in <6f4756ba89eb4e0eb1e2389046c87220>:0 
  at Oxide.Game.Rust.Libraries.Command.HandleChatCommand (BasePlayer sender, System.String name, System.String[] args) [0x00015] in <6f4756ba89eb4e0eb1e2389046c87220>:0 
  at Oxide.Game.Rust.RustCore.TryRunPlayerCommand (BasePlayer basePlayer, System.String message, System.String commandPrefix) [0x000c2] in <6f4756ba89eb4e0eb1e2389046c87220>:0 

And when try to reload plugin showing like this

18:20 [Error] Failed to call hook 'Unload' on plugin 'PortableLocker v1.4.7' (NullReferenceException: Object reference not set to an instance of an object)
  at Oxide.Plugins.PortableLocker.SaveContainer () [0x0009d] in <5295c34c08f44e58b3c8657cc3c50c4c>:0 
  at Oxide.Plugins.PortableLocker.Unload () [0x0007e] in <5295c34c08f44e58b3c8657cc3c50c4c>:0 
  at Oxide.Plugins.PortableLocker.DirectCallHook (System.String name, System.Object& ret, System.Object[] args) [0x00342] in <5295c34c08f44e58b3c8657cc3c50c4c>:0 
  at Oxide.Plugins.CSharpPlugin.InvokeMethod (Oxide.Core.Plugins.HookMethod method, System.Object[] args) [0x00079] in <42f9bedc659b4f4786eb778d3cd58968>:0 
  at Oxide.Core.Plugins.CSPlugin.OnCallHook (System.String name, System.Object[] args) [0x000de] in <d59b507fd76240e5b62228d0eae39b73>:0 
  at Oxide.Core.Plugins.Plugin.CallHook (System.String hook, System.Object[] args) [0x00060] in <d59b507fd76240e5b62228d0eae39b73>:0 
18:20 [Info] Unloaded plugin PortableLocker v1.4.7 by Raul-Sorin Sorban
18:20 [Error] Failed to call hook 'OnServerInitialized' on plugin 'PortableLocker v1.4.7' (NotImplementedException: Unknown wire type: 3)
  at SilentOrbit.ProtocolBuffers.ProtocolParser.SkipKey (BufferStream stream, SilentOrbit.ProtocolBuffers.Key key) [0x0006b] in <936831a09d2245b5af6ce4177639876b>:0 
  at ProtoBuf.Entity.Deserialize (BufferStream stream, ProtoBuf.Entity instance, System.Boolean isDelta) [0x029ef] in <936831a09d2245b5af6ce4177639876b>:0 
  at ProtoBuf.Entity.Deserialize (System.Byte[] buffer) [0x00013] in <936831a09d2245b5af6ce4177639876b>:0 
  at Oxide.Plugins.PortableLocker.LoadContainer () [0x00069] in <5295c34c08f44e58b3c8657cc3c50c4c>:0 
  at Oxide.Plugins.PortableLocker.OnServerInitialized () [0x0001e] in <5295c34c08f44e58b3c8657cc3c50c4c>:0 
  at Oxide.Plugins.PortableLocker.DirectCallHook (System.String name, System.Object& ret, System.Object[] args) [0x00142] in <5295c34c08f44e58b3c8657cc3c50c4c>:0 
  at Oxide.Plugins.CSharpPlugin.InvokeMethod (Oxide.Core.Plugins.HookMethod method, System.Object[] args) [0x00079] in <42f9bedc659b4f4786eb778d3cd58968>:0 
  at Oxide.Core.Plugins.CSPlugin.OnCallHook (System.String name, System.Object[] args) [0x000de] in <d59b507fd76240e5b62228d0eae39b73>:0 
  at Oxide.Core.Plugins.Plugin.CallHook (System.String hook, System.Object[] args) [0x00060] in <d59b507fd76240e5b62228d0eae39b73>:0 
18:20 [Info] Loaded plugin PortableLocker v1.4.7 by Raul-Sorin Sorban

Need assistance ASAP! Players lost their items and can't get it back and now plugin doesn't work! 

Thanks

@Raul-Sorin Sorban Would you able to have a look please? Plugin doesn't work for me...