# How to solve this error **URL:** \ **Category:** Unity SDK\ **Tags:** question, unity\ **Created:** [September 29, 2025, 8:01am UTC](https://forum.convai.com/t/how-to-solve-this-error/5207 "2025-09-29T08:01:07Z")\ **Posts on this page:** 3\ **Page:** 1
**Author:** ![Yathish](https://yyz2.discourse-cdn.com/flex004/user_avatar/forum.convai.com/yathish/32/5678_2.png) [@Yathish](https://forum.convai.com/u/Yathish)\ **Post date:** [September 29, 2025, 8:01am UTC](https://forum.convai.com/t/how-to-solve-this-error/5207/1 "2025-09-29T08:01:07Z")
NullReferenceException: Object reference not set to an instance of an object UnityEditor.Android.TargetExtension.OnUnload () (at /home/bokken/build/output/unity/unity/PlatformDependent/AndroidPlayer/Editor/Managed/ExtensionModule.cs:75) UnityEditor.Modules.ModuleManager.ShutdownPlatformSupportModules () (at \<4b8f645257c94d1296f440a10c6f388e\>:0) how to resolve this error ---
**Author:** ![K3](https://yyz2.discourse-cdn.com/flex004/user_avatar/forum.convai.com/k3/32/2611_2.png) [@K3](https://forum.convai.com/u/K3)\ **Post date:** [September 29, 2025, 10:35am UTC](https://forum.convai.com/t/how-to-solve-this-error/5207/2 "2025-09-29T10:35:34Z")
Hello, **Welcome to the Convai Developer Forum!** This error isn’t related to Convai. It’s coming from Unity’s Android platform modules. I recommend checking Unity forums or other community resources for this specific stack trace, and ensuring your Android Build Support components are correctly installed and up to date. You can also try reimporting packages, deleting `Library/`, and restarting the Editor. ---
**Author:** ![system](https://canada1.discourse-cdn.com/flex004/uploads/convai/original/1X/e60ef96aa7334c5ccf6682f6c6dbc20fcfa96b49.png) [@system](https://forum.convai.com/u/system)\ **Post date:** [October 29, 2025, 10:36am UTC](https://forum.convai.com/t/how-to-solve-this-error/5207/3 "2025-10-29T10:36:33Z")
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