EXC Value cannot be null. Parameter name: key

[Diegar]

Version

3.0

Platform

Windows

Getting the following error on my newly generated 3.0 dedicated server. I generated this version with no running mods. I did generate it with my rwgmixer mod which gives me only citybig type cities. This error pops up a lot and only seems to happen in and around cities upon entering a cluster with something wrong in it. I generated this instance to rule out my prefabs on other server builds. The error itself presents on the client-side:

2026-06-30T12:20:47 155.449 EXC Value cannot be null.
Parameter name: key
Parameter name: key
at System.Collections.Generic.Dictionary`2[TKey,TValue].FindEntry (TKey key) [0x00008] in <1071a2cb0cb3433aae80a793c277a048>:0
at System.Collections.Generic.Dictionary`2[TKey,TValue].TryGetValue (TKey key, TValue& value) [0x00000] in <1071a2cb0cb3433aae80a793c277a048>:0
at SignDataManager.TryGetRenderingData (GlobalSignId signId, SignDataManager+SignRenderingData& signRenderingData) [0x0000f] in <d983dee3f9114d09bdb3b5f8df4452f8>:0
at SignDataManager.TryApplyRenderingData (GlobalSignId signId, SignDataManager+RenderingDataPatcher patcher, System.Collections.Generic.List`1[T] signRenderers, SignCanvas+SignBlendMode blendMode, UnityEngine.Camera targetCamera) [0x00000] in <d983dee3f9114d09bdb3b5f8df4452f8>:0
at SignCanvas.RefreshRenderers () [0x00033] in <d983dee3f9114d09bdb3b5f8df4452f8>:0
at SignCanvas.Initialize (SignDataManager+RenderingDataPatcher _alternativePatcher) [0x00030] in <d983dee3f9114d09bdb3b5f8df4452f8>:0
at ImposterSignFactory.Create (UnityEngine.GameObject _parent, ImposterCanvas _data) [0x0016b] in <d983dee3f9114d09bdb3b5f8df4452f8>:0
at PrefabLODManager.LoadImposterSigns (PrefabLODManager+PrefabGameObject _pgo, UnityEngine.GameObject _go, SimpleMeshInfo _meshInfo) [0x0003c] in <d983dee3f9114d09bdb3b5f8df4452f8>:0
at PrefabLODManager.BuildGameObjectFromMeshInfo (SimpleMeshInfo _meshInfo, PrefabLODManager+PrefabGameObject _pgo) [0x00255] in <d983dee3f9114d09bdb3b5f8df4452f8>:0
at PrefabLODManager.meshLoadedCallback (SimpleMeshInfo meshInfo, System.Object userCallbackData) [0x0005a] in <d983dee3f9114d09bdb3b5f8df4452f8>:0
at SimpleMeshFile+<>c__DisplayClass20_0.<ReadMeshAsyncInternal>b__0 (System.Object data) [0x00000] in <d983dee3f9114d09bdb3b5f8df4452f8>:0
at ThreadManager.UpdateMainThreadTasks () [0x00080] in <d983dee3f9114d09bdb3b5f8df4452f8>:0
UnityEngine.StackTraceUtility:ExtractStringFromException(Object)
Log:Exception(Exception)
ThreadManager:UpdateMainThreadTasks()
GameManager:gmUpdate()
GameManager:Update()

rwgmixer mod: https://www.diegar.com/7dtd/DiegarRWGCitiesV1.zip

Client-side log: https://www.diegar.com/7dtd/output_log_client__2026-06-30__12-18-08.txt

Server-side log, including server generation: https://www.diegar.com/7dtd/output_log_dedi__2026-06-30__11-45-53.txt

 

[SpiritChill]

Hey unfortunately we cannot troubleshoot mods would you be able to try and reproduce this without the mod?

 

[Diegar]

Hey unfortunately we cannot troubleshoot mods would you be able to try and reproduce this without the mod?

Hopefully you'll see this. It didn't take too long. Generated a pure vanilla server, hopped on a motorcycle to head into the wasteland. Took maybe a kilometer and error popped up
Screenshot: https://www.diegar.com/7dtd/VanillaScreenshot.png

Server Log with generation: https://www.diegar.com/7dtd/output_log_dedi__2026-06-30__13-08-38.txt

Client Log: https://www.diegar.com/7dtd/output_log_client__2026-06-30__13-10-21.txt

Including my code just in case it helps: AAAIABIACIADIARFAGHAHIAFIEIIASJBAABBAAMKBTEBQHBGBBHCBJABKABLABNCBWACABCCGCXBCYDDMIDALDEIDPHEXGFFKETK

 

[WretchedDollie]

Hey there,

Stepping in really quickly since I have firsthand knowledge of this one. This is a sporadic, known issue that we have been actively working on internally. We hope to have a fix for it soon.

Best,
Dollie