Unity.Netcode.SceneEventData.DeserializeScenePlacedObjects Error | Official Unity Discord | Page 1

icy crater Nov 21, 2025, 5:05 PM

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I just dont understand, this error i get everytime for 1-2 scenes. As soon as it loads. This error comes and many inplaced network objects few disappeared, few appeared. And also everything on that scene just corrupts related to Network.

Full Trace

NullReferenceException: Object reference not set to an instance of an object
Unity.Netcode.SceneEventData.DeserializeScenePlacedObjects () (at ./Library/PackageCache/com.unity.netcode.gameobjects@bd2a018756ed/Runtime/SceneManagement/SceneEventData.cs:897)
Unity.Netcode.NetworkSceneManager.OnClientLoadedScene (System.UInt32 sceneEventId, UnityEngine.SceneManagement.Scene scene) (at ./Library/PackageCache/com.unity.netcode.gameobjects@bd2a018756ed/Runtime/SceneManagement/NetworkSceneManager.cs:1878)
Unity.Netcode.NetworkSceneManager.OnSceneLoaded (System.UInt32 sceneEventId) (at ./Library/PackageCache/com.unity.netcode.gameobjects@bd2a018756ed/Runtime/SceneManagement/NetworkSceneManager.cs:1806)
Unity.Netcode.SceneEventProgress.<SetAsyncOperation>b__38_0 (UnityEngine.AsyncOperation asyncOp2) (at ./Library/PackageCache/com.unity.netcode.gameobjects@bd2a018756ed/Runtime/SceneManagement/SceneEventProgress.cs:280)
UnityEngine.AsyncOperation.InvokeCompletionEvent () (at <e2f443b25d304a2687b17dc8ac7af722>:0)

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It's Unity's Netcode error. No errors from my codes

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I tried clearing package cache but still same

halcyon bough Nov 21, 2025, 6:01 PM

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Which version Unity and NGO are you running?
Are you loading these scenes additive or single?
Does it happen with a fresh scene with no network objects?

icy crater Nov 21, 2025, 6:22 PM

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I am using Unity 6000.0.61

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And latest NGO version right now

icy crater Nov 21, 2025, 6:22 PM

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halcyon bough Which version Unity and NGO are you running? Are you loading these scenes additi...

I am loading single scene. And it have in placed metwork objects

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It used to work fine but it's bugged now

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I just don't know. This happened suddenly. And now everytime happening for just particular 1-2 scenes

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Also this sometimes fix when I create fully new scene and copy paste all my old scene objects to new scene

halcyon bough Nov 21, 2025, 7:15 PM

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icy crater Also this sometimes fix when I create fully new scene and copy paste all my old ...

I would add the network objects back in small batches so you can see which ones are causing this issues

icy crater Nov 22, 2025, 3:33 AM

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halcyon bough I would add the network objects back in small batches so you can see which ones ...

How to add them in Batches?

restive cliff Nov 22, 2025, 3:52 AM

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icy crater How to add them in Batches?

He just means taking them all out of the scene and adding them back a couple at a time so it’s easier to find out what ones are causing the issue

icy crater Nov 22, 2025, 3:54 AM

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restive cliff He just means taking them all out of the scene and adding them back a couple at ...

Ohh I got it. The problem is everything related to network in that scene seems corrupted. My Map Manager script which is also a network behaviour does not execute any rpcs. Other network objects are also just don't work

icy crater Nov 22, 2025, 4:15 AM

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I was right. I made a completely new scene and pasted all my objects in the new scene, baked lighting. And it is working now.

This even fixed the issue for other scene which had same issue without making new scene for them.

#Unity.Netcode.SceneEventData.DeserializeScenePlacedObjects Error