before you read on,Note that your plugin works fine - the error below only shows when i use another plugin called UnlimitedElevators by KillYou
Anychance you can get this plugin to work with UnlimitedElevators
Thanks

Failed to run a 0.10 timer in 'ElevatorControl v1.0.2' (NullReferenceException: Object reference not set to an instance of an object)
  at Oxide.Plugins.ElevatorControl+<OnEntitySpawned>c__AnonStorey0.<>m__0 () [0x0007c] in <ce6feac7b40a487bae3adf6c390f9f75>:0
  at Oxide.Core.Libraries.Timer+TimerInstance.FireCallback () [0x00018] in <cf88a28c7fb44d36890d85a78331cc9d>:0

To the plugin author, I suggest hooking OnEntitySpawned(ElevatorIOEntity) so that you don't have to add a timer delay, which should avoid this issue.

Same problem here thanks

Hey, I will fix these shortly