i tried to contact you, but never got a reply.
maybe you read this thread.
UpLifted (paid plugin) is not working anymore

 Failed to call hook 'OnEntityKill' on plugin 'UpLifted v1.2.13' (ArgumentNullException: Value cannot be null.
Parameter name: source)
  at System.Linq.Enumerable.ToList[TSource] (System.Collections.Generic.IEnumerable`1[T] source) [0x0000d] in <b7efe7e6e548497fac3c4a6049a0a4b6>:0 
  at Oxide.Plugins.UpLifted+Elevator.IsDoor (BaseEntity ent) [0x00000] in <4df6d5f7ec63478aa88fd9a1a8c1ebf4>:0 
  at Oxide.Plugins.UpLifted.OnEntityKill (BaseNetworkable entity) [0x0004b] in <4df6d5f7ec63478aa88fd9a1a8c1ebf4>:0 
  at Oxide.Plugins.UpLifted.DirectCallHook (System.String name, System.Object& ret, System.Object[] args) [0x00611] in <4df6d5f7ec63478aa88fd9a1a8c1ebf4>: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 <b0a93b504f034a0db8b1c3d2503c0987>:0 
  at Oxide.Core.Plugins.Plugin.CallHook (System.String hook, System.Object[] args) [0x00060] in <b0a93b504f034a0db8b1c3d2503c0987>:0
(17:26:48) | [UpLifted] Loading problem detected at:System.NullReferenceException: Object reference not set to an instance of an object
  at Oxide.Plugins.UpLifted+Elevator.Ld2Prt (ProceduralLift procLift, Oxide.Plugins.UpLifted+ELStorage data) [0x00521] in <4df6d5f7ec63478aa88fd9a1a8c1ebf4>:0 
  at Oxide.Plugins.UpLifted.OnServerInitialized () [0x002c0] in <4df6d5f7ec63478aa88fd9a1a8c1ebf4>:0
(17:26:48) | [UpLifted] Plugin HALTED to protect the datafile. Contact the Developer
(17:26:48) | [UpLifted] Lifts not saved to file due to before loading issue!​

Please use the support site for that plugin. This section and site are not for support with private plugins.