# When using the map features prefab spawner, I get this error

**URL:** <https://community.nianticspatial.com/t/when-using-the-map-features-prefab-spawner-i-get-this-error/5218>\
**Category:** I'm Stuck\
**Tags:** maps\
**Created:** [February 20, 2025, 4:56am UTC](https://community.nianticspatial.com/t/when-using-the-map-features-prefab-spawner-i-get-this-error/5218 "2025-02-20T04:56:48Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![Hassan\_Karim](https://avatars.discourse-cdn.com/v4/letter/h/3ab097/32.png) [@Hassan\_Karim](https://community.nianticspatial.com/u/Hassan_Karim)\
**Post date:** [February 20, 2025, 4:56am UTC](https://community.nianticspatial.com/t/when-using-the-map-features-prefab-spawner-i-get-this-error/5218/1 "2025-02-20T04:56:48Z")

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The error is  
NullReferenceException: Object reference not set to an instance of an object  
Niantic.Lightship.Maps.Samples.GameSample.MapFeaturePrefabSpawner.Build (Niantic.Lightship.Maps.Core.IMapTile mapTile, UnityEngine.GameObject parent) (at Assets/Samples/Lightship Maps SDK/0.4.0/Map-Based Resource Game/Scripts/MapFeaturePrefabSpawner.cs:27)  
Niantic.Lightship.Maps.Internal.MapTileObject.BuildStandardBuilder (Niantic.Lightship.Maps.Builders.IFeatureBuilder builder, Niantic.Lightship.Maps.MapTileObjectHelpers.TilePair tile) (at ./Library/PackageCache/com.niantic.lightship.maps@fb4247cae5/Runtime/Niantic.Lightship.Maps/Internal/MapTileObject.Async.cs:129)  
Niantic.Lightship.Maps.Internal.MapTileObject.Build (System.Collections.Generic.IReadOnlyList`1[T] mapTiles, Niantic.Lightship.Maps.Jobs.IBuilderJobMonitorManager builderJobMonitorManager) (at ./Library/PackageCache/com.niantic.lightship.maps@fb4247cae5/Runtime/Niantic.Lightship.Maps/Internal/MapTileObject.Async.cs:105) Niantic.Lightship.Maps.LightshipMapView.AddMapTiles (System.Collections.Generic.IReadOnlyList`1[T] mapTiles) (at ./Library/PackageCache/com.niantic.lightship.maps@fb4247cae5/Runtime/Niantic.Lightship.Maps/LightshipMapView.cs:491)  
Niantic.Lightship.Maps.LightshipMapView.Update () (at ./Library/PackageCache/com.niantic.lightship.maps@fb4247cae5/Runtime/Niantic.Lightship.Maps/LightshipMapView.cs:258)

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**Author:** ![Maverick\_Niantic](https://avatars.discourse-cdn.com/v4/letter/m/8edcca/32.png) [@Maverick\_Niantic](https://community.nianticspatial.com/u/Maverick_Niantic)\
**Post date:** [March 11, 2025, 6:56pm UTC](https://community.nianticspatial.com/t/when-using-the-map-features-prefab-spawner-i-get-this-error/5218/2 "2025-03-11T18:56:42Z")

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Hi Hassan,

I’m sorry to hear you’re having trouble with Maps. Could you give me some more information on the Unity and ARDK versions you’re running? Have you modified any scripts or the scenes at all?

Kind regards,  
Maverick L.

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**Author:** ![Maverick\_Niantic](https://avatars.discourse-cdn.com/v4/letter/m/8edcca/32.png) [@Maverick\_Niantic](https://community.nianticspatial.com/u/Maverick_Niantic)\
**Post date:** [March 5, 2026, 11:45pm UTC](https://community.nianticspatial.com/t/when-using-the-map-features-prefab-spawner-i-get-this-error/5218/3 "2026-03-05T23:45:02Z")

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Age