Card not working for all coloured cards

Purple card not working on all doors ie: Oilrig. But when used normal card it opened, Anyone got any ideas why. Thanks

NullReferenceException: Object reference not set to an instance of an object
  at Oxide.Plugins.SuperCard+<OnLootSpawn>c__AnonStorey0.<>m__2 () [0x00029] in <527a1ae43fb441d3bdd9a9dd0d408970>:0 
  at InvokeHandlerBase`1[T].DoTick () [0x000be] in <cfd35219d0264d2096e6ee8e718f9da8>:0 
  at InvokeHandlerBase`1[T].LateUpdate () [0x0000c] in <cfd35219d0264d2096e6ee8e718f9da8>:0 
 
(Filename: <527a1ae43fb441d3bdd9a9dd0d408970> Line: 0)


we use a custom map, rustedit is updated, server and umod are updated...

Thanks for a fix please