Huge error and kicking

Players are getting an error while they are in the middle of a RB and get kicked from the server and this error shows up in the console. They can not rejoin server.

SickNemesis disconnecting: Exception (cs:58851): NullReferenceException: Object reference not set to an instance of an object. ElevatorLift.Menu_LowerElevator_ShowIf (BasePlayer p) (at <00000000000000000000000000000000>:0) ElevatorLift.get_HasMenuOptions () (at <00000000000000000000000000000000>:0) BasePlayer.UpdateLookingAt (System.Single radius, System.Boolean includeSecondaryEntities) (at <00000000000000000000000000000000>:0) BasePlayer.ClientUpdateLocalPlayer () (at <00000000000000000000000000000000>:0) BasePlayer.ClientCycle (System.Single deltaTime) (at <00000000000000000000000000000000>:0) Client.Update () (at <00000000000000000000000000000000>:0)

elevators do not copy nor paste properly. there is a thread for this in the copypaste forum. you will have to remove elevators from your copypaste file