# Error Message when opening Github samples in Unity 2021.3.23f1

**URL:** <https://community.nianticspatial.com/t/error-message-when-opening-github-samples-in-unity-2021-3-23f1/4787>\
**Category:** I'm Stuck\
**Created:** [August 26, 2024, 11:32am UTC](https://community.nianticspatial.com/t/error-message-when-opening-github-samples-in-unity-2021-3-23f1/4787 "2024-08-26T11:32:17Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![Nick\_Dunn](https://avatars.discourse-cdn.com/v4/letter/n/ecb155/32.png) [@Nick\_Dunn](https://community.nianticspatial.com/u/Nick_Dunn)\
**Post date:** [August 26, 2024, 11:32am UTC](https://community.nianticspatial.com/t/error-message-when-opening-github-samples-in-unity-2021-3-23f1/4787/1 "2024-08-26T11:32:17Z")

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_Include the following details (edit as applicable):_

- **Issue category** : Unity Example Package
- **Device type & OS version** : iOS
- **Host machine & OS version** : Mac
- **Issue Environment** :
- **Xcode version** : 14.3
- **ARDK version** : 3.0
- **Unity version** : 2021.3.23f1

Description of the issue:

I get these error messages when opening the GitHub samples folder:

Library/PackageCache/com.nianticlabs.lightship.sharedar@724b33c9d1/Runtime/Colocalization/SharedSpaceManager.cs(383,31): error CS1061: ‘NetworkObject’ does not contain a definition for ‘SceneMigrationSynchronization’ and no accessible extension method ‘SceneMigrationSynchronization’ accepting a first argument of type ‘NetworkObject’ could be found (are you missing a using directive or an assembly reference?)

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**Author:** ![JoshM](https://avatars.discourse-cdn.com/v4/letter/j/4af34b/32.png) [@JoshM](https://community.nianticspatial.com/u/JoshM)\
**Post date:** [August 26, 2024, 11:32pm UTC](https://community.nianticspatial.com/t/error-message-when-opening-github-samples-in-unity-2021-3-23f1/4787/2 "2024-08-26T23:32:42Z")

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Hello! Thanks for reaching out. The only version of Unity 2021 that’s supported by Lightship’s ARDK 3.0 is version 2021.3.29f1. If possible, could you update your Unity version to version 2021.3.29f1?

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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, 11:44pm UTC](https://community.nianticspatial.com/t/error-message-when-opening-github-samples-in-unity-2021-3-23f1/4787/3 "2026-03-05T23:44:25Z")

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Age